They feel quite good and have a lot better power than the hayes and magura setups I have ridden in the past. They work well under both XC and DH loads. They work well with the 160mm rotors and are awesome with the larger rotors.
My only complaint is that my rear turned out to be a bad caliper. It took nearly a month to get the replacement back from SRAM warranty.
Function, fit, and finish are all excellent
SRAM warranty is poor.