Theres quite a bit of bad press with these calipers, one of the big problems is that unless they're fitted properly they will feel shocking.
I've recently had to.....shall we say...enlighten some of the TTRS chaps over on the VAGOC forum that in every single installation I have EVER EVER seen of these calipers they have been upside down so no wonder they feel crap and wear out pads at an accelerated rate
http://www.vagoc.co.uk/vb/showthread.php?t=7025&page=2Even the big tuners such as AMD/TT Shop and all the others which supposedly know what they're doing never bothered converting them from lagging to leading. The RS3 will be the first VAG with leading 8 pots.
So the pedal feel will be much improved and their is potential for these calipers to become a good upgrade mated with some good pads. Be warned the pads for these calipers retail at around £600 with the VAT and shipping for the RS29's that the TT boys will be fitting cheapies are available from ebay for £80
The small piston sizes on the leading side are only 30mm so should give good bite and the pedal will better than say a 4 pot with the same surface area such as a 40/46.
They aren't worth £1200 with a dodgy paint job, if they've been tracked with OEM pads they'll probably also be warped which is in 9 out of 10 cases the reason why there on ebay or being sold
The calipers need work but would then be relifed as gallardo calipers as the setup is in essence the same
You could also use some AP 362mm discs on custom bells and custom carriers and move the whole assembly inboard on a TT to mitigate spacer requirements, Im talking to somebody on the VAGOC at the moment about doing that - rplacement discs would be 350
The pad is also a 54mm deep pad on a 61mm deep disc which is why you get the big lips and rusty rings on these setups - parts bin engineering at its worst