Got the 343mm kit installed on my car.
Using 20mm H&R spacers because there was only an mm or so clearance between my OZ Ultraleggeras and the callipers - i.e. they'd probably fit without spacers but the clearance would be minimal.
Haven't pushed the car hard on these things yet but so far the brake feel is vibration free, with excellent modulation and pedal feedback characteristics. More-than-ample stopping power of course as well.
Pads are Ferodo DS2500s. They're used (as is the kit itself) and have been tracked before but no noise etc.
Anyhow, pics:
Front
Front close up
Rear
Rear close up
Outside
