I cleaned out my desk at work and found some notes I made during a tournament in march this year. I totally forgot to write them to full battle reports, but here they are in a short version.
I played Cadians with:
CADIAN REGIMENTAL HEADQUARTERS [625]
1 Imperial Guard Supreme Commander unit, 7 Kasrkin units and 1 Leviathan Mobile Command Centre, Sabre Platforms (3 Sabre Platforms), Sanctioned Psykers (1 Sanctioned Psyker unit)
CADIAN INFANTRY COMPANY [250]
1 Imperial Guard Commander unit and 12 Imperial Guard units
KASRKIN INFANTRY COMPANY [525]
1 Imperial Guard Commander unit and 7 Kasrkin units, Sabre Platforms (3 Sabre Platforms), Assault Transport (2 Stormlords)
MECHANIZED KASRKIN [300]
1 Imperial Guard Commander unit, 7 Kasrkin units, 4 Valkyries
DEATHSTRIKE BATTERY [200]
2 Deathstrike Missile Launchers
FLAK BATTERY [150]
3 hydras
GRIFFON PLATOON [200]
6 Griffons
HELLHOUND PLATOON [250]
6 Hellhounds
SUPER HEAVY TANK PLATOON [200]
Shadowsword
THUNDERBOLT FIGHTERS [150]
2 Thunderbolts
THUNDERBOLT FIGHTERS [150]
2 Thunderbolts
First game was a against "all faction" Black Legion.
DAEMON POOL [140]
(Chaos Undivided), Greater Daemon, 6 Lesser Daemon
RETINUE [425]
8 Chaos Space Marines, (Chaos Undivided), Chaos Warlord (Supreme Commander), Obliterator, Daemonic Pact
RETINUE [390]
8 Chaos Space Marines, (Khorne), Sorcerer Lord, 4 Rhino, Daemonic Pact, Chaos Champion
RETINUE [340]
8 Chaos Space Marines, (Nurgle), Sorcerer Lord, 4 Rhino, Daemonic Pact
BIKE COMPANY [325]
8 Chaos Space Marines Bikes, (Slaanesh), Sorcerer Lord, Daemonic Pact
RAPTOR CULT [200]
4 Raptor, (Tzeentch), Sorcerer Lord, Daemonic Pact
RAPTOR CULT [200]
4 Raptor, (Tzeentch), Sorcerer Lord, Daemonic Pact
HELL BLADES [200]
3 Hell Blade Fighters, (Chaos Undivided)
HELL TALONS [225]
2 Hell Talon Bombers, (Chaos Undivided)
DEATH WHEEL SQUADRON [275]
(Chaos Undivided), Death Wheel
DEATH WHEEL SQUADRON [275]
(Chaos Undivided), Death Wheel
The SC Retinue was blitzguard. The Bikes, Raptors and one Death Wheel was deployed in the centre of the table, the Nurgle and Khorne retinues and the secon Wheel at my right wing. I deployed "left-centerish" with most of my units except for the Valkyries, Hydras and Infantry Coy, which I placed at my right (the Valkyries as "early deployment bait" since I had other plans for them. The table was mostly buildings and ruins, and one of the wheels and the nurgle retinue hade to pass a bridge to reach the main battle. If I had gone for the blitz the same would I.
My opponent is a very good player but not the best one at strategy rolls... Hence my Deathstrikes killed of the center wheel. Then the battle started. The battle in the center was quite uneven after the demise of the wheel. My two main units (HQ and Stormlords) advanced slowly and in the end shot up most of the khorne retinue (before any bloodthirster showed up). At my right wing I found out that those nurgle boys are almost as hard as TS to kill (more about them later). Much shooting and some assaulting there in the end, not to my favor. Anyway, the time ran out before we could start turn four, but I think it ended 1-0 to me, with either They shall not pass or Take and Hold.
Best units were the Stormlords and Hellhounds. I guess some SL players envy Cadians for the Hellhound formation. Or at least they are a fun substitute for single Warhounds, with speed and ability to engage. The Stormlord formation both shot a lot of casualties and proved durable and repelled an assault from the chaos infantry and daemons.
My second game was against Orks. The army looked something like this:
Mob in Landa
Mob in Landa
Big mob with some extra
Gun wagons + flak & zzap
Gun wagons + flak & zzap
More gun wagons + flak flak & zzap zzap
Stormboys + scorchas
Scorchas and buggies
Big scorchas and buggies
3 Fighta-bombas
At my right wing I garrisoned the infantry coy on overwatch. Behind them just below and on a hill my mighty griffons and hydras bastioned

The big scorcha-unit was to face the wrath of the griffons after wiping out my brave footsloggers. I thought. It just didn't go that way...
1st turn.
1st ork: Landa 1 air assaulting hydras. Flak! Hit! Critical hit! In the air...
2nd ork: Landa 2 air assaulting hydras. Flak! Hit! Great excitement. But no crit. Overwatch from Infantry on orks. Lots of dead boys. Hydras wiped out, but the boys were broken.
1st Cadia: shadowsword popped the Landa. (to avoid advancing towards all those odd boys)
3rd ork: Without overwatch those infantry won't be any resistance for Big scorchas the Warlord thought. But since just a few scorchas made it into the FF and the rolls were bad, the Cadian infantry won. And the griffons got to fire at broken scorchas instead...
After that it was a slow roll forward for the Cadians, but some super heavies were lost to ood boys. I think it ended 3-0 in turn 3. A big gamble by the Orks that didn't pay off.
Best units during the battle was the Griffons(!) and Hellhounds. I moved the griffons around quite much to both prep the target and support when the hellhounds engaged. Two really fun units to have in the army. And an enemy army of infantry and light vehicles made it more fun.
The third game was against Red Corsairs. The list had these units. I don't know how he got it within 3000 pts, but perhaps some points have changed since (or he didn't have a SC or someting..)
RENEGADE WARBAND [465]
4 Chaos Space Marine units, 4 Thousand Sons units, Chaos Warlord, 4 Chaos Rhino, Chaos Hunter
RENEGADE WARBAND [325]
Chaos Lord, 4 Chaos Space Marine units, 4 Thousand Sons units (or Havocs?)
CHAOS THUNDERHAWK [200]
1 Chaos Thunderhawk Gunship
TERMINATOR RETINUE [375]
Chaos Lord, 4 Terminator unit, Obliterators
CHOSEN [205]
6 Chaos Chosen units, 3 Chaos Rhino
SILVER TOWER CIRCLE [325]
4 Silver Towers
SILVER TOWER CIRCLE [325]
4 Silver Towers
DEFILER ASSAUT FORCE [275]
4 Defilers
ONE HARBINGER BOMBER [400]
THREE HELLBLADE INTERCEPTORS [200]
Here I lost my head during deployment. Instead of sitting in my super heavies nicely sheltered from the harbringer I tried to spread out the infantry under the AA umbrella. The main battle took place center/right wing with my Infantry Coy, Shadowsword and Valkyries facing of with the Defilers and Chosen at the center/left, with the defilers taking one of my objectives (after some help from the Harbringer).
The Harbringer killed about half of the HQ in the first round (but to a hit or two from flak). After that the Hellblades broke them. After that my Stormlords and tanks rolled forward towards his BTS retinue. At turn two the Terminators teleported and destroyed my HQ (BTS) with a critical on the Leviathan, but lost all terminators (in the fight and to some shooting afterwards). My hunt for his BTS was hindered by TS standing in front and making all their saves… :/ But in turn four i managed to kill them off, although the air transported retinue hindered me from taking any objectives. Around my blitz a lone obliterator regrouped at the end of turn three, made some saves, killed the last hydra and took the blitz when the last deathstrike chassis and one of my thunderbolts failed to activate. I think the loss was 1-3 with both BTS gone and I also lost Blitz and Take and hold.
Best units were the Stormlords infantry which again proved to be tougher than most IG units. They might have achieved greater success if the TS hadn’t made all their saves. In the end I think they were broken but it took both retinues, silver towers and thunderhawk to do it.
Overall I think the Cadian list is quite stable and fun to play with. I think I played a bit to defensively with the two main units, since I got so surprised of the durability of both Stormlords and the Leviathan. Compared to Stormtroopers I didn’t miss Scout on the Kasrkin, perhaps because I only had them mounted. But they could well cost another 25 points to be in parity with SL stormtroopers. After all, if using them on foot, you have a "autocannon ping at 45 cm" and the possibility of bringing some cheap AA to the army.