6130 commuting and recreational miles on mine. Two warranty issues resolved nicely by Felt/Shimano/LBS. Only remaining niggle is it doesn't track quite straight at low speed (< 10mph), but this hasn't been bothersome enough to have looked at.
Initially I didn't care for the look of the heavily sloped top tube, but it's grown on me and I appreciate the extra stand over room when commuting.
I actually found the stock saddle very comfortable and was disappointed when the pan cracked and I had to retire it.
Upgrades: Ultegra brakes and RD, Felt 1.2 fork (warranty replacement - original was not aligned correctly), wheels (DT Swiss RR465+ Ultegra hubs).
Fun, versatile bike. Would not hesitate to get another should something happen to this one.