Anyone have hands on experience with one of these?

CZ-USA Scorpion EVO 3 S1 Carbine faux supp 9mm

I don't have that particular model but I do have the pistol with brace version. Very pleased with mine, they are very accurate, very easy to service due to simple operation and just a lot of fun. There is a ton of aftermarket support for them and they generally are very easy to customize to your hearts desire. Like the platform well enough that I am preparing to order another version as a second. I have never had a malfunction with mine and in June I attended a 2 day 1200+ round PCC/Subgun training class with a couple friends who used their Scorpions and they never had a single malfunction throughout the entire 1200+ round class. I also have an full auto MP5 and the controls on the Scorpion are a huge improvement on the MP5's. Scorpion just doesn't have the happy switch.

I have that model except in black. I have a Holosun red dot on it as well as a Magpul vertical fore-grip and Inforce WMLx light mounted on the left side.

I love it. Soft shooting, accurate, and has been 100% reliable.

I picked up a soft-side padded mandolin case on clearance online a few years ago and the Scorpion fits inside with the stock folded.

I don't have that model. I have the pistol version that I SBR'ed. I shoot it in Steel Challenge matches and it's been flawless. I've probably shot close to 4 thousand rounds through it. I have a friend that got the same model you are looking at and he also shoots it in Steel Challlenge matches and so far his has been flawless.
I did put a HBI trigger in mine and I also changed the right side selector switch to an HBI AK47 style lever (took the picture before I switched it out). I now use only the right side selector switch as it's much easier for me to use than the left side switch. If you are right handed you'll find that stock right side selector switch will most likely eat at your hand.
Go for it!

I also have an EVO 3 pistol with a Sig Brace and I love it! I replaced the right side safety lever with a flat filler and added a red dot and a Surefire light/laser.

It’s basically a non-NFA SBR and it’s legal to have in a vehicle in Michigan with a CPL. Mine hasn’t hiccuped once, is quite accurate and a lot of fun to shoot.

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I have one I carry in a ukulele case. Way fun!

Thanks everyone!