They're the same as the mk7 R caliper, so a big single piston like the tried and tested R32/S3 setup. Just a revision of those calipers really. They're a bit heavy, but they use the later 340mm disc which is a bit lighter than the 345mm version. Oh and the GTI version is red with the all important GTI logo :)
They're nothing special and didn't cost much, but should handle my sort of driving quite comfortably. I suppose I could have saved a little longer and gone for a 4 pot setup (as I'll inevitably need that if I do eventually go for a bigger turbo) but I thought it was sensible to get these on for now. I'm sure they'll sell on easily if and when I get a bigger kit, and it means I can drive with a little more security with 270bhp than I would on the 312s.
And yes, they're straight bolt on!