One month in to riding the Quantum and it has been excellent, about 250 miles on the odometer so far. Frame fits me extremely well and the high handle bar height is quite comfortable. Had a minor issue last week with the non-drive side crank creaking a bit, so I took both cranks off, cleaned up the square taper mating surfaces (I must have spaced and not cleaned them at all, there was a bunch of dirty crud), put it back together and that fixed the creak.
First ride stopping issue today though. Snapped a spoke on the rear wheel going to work. Annoying, but I was still fairly close to home so I had time to ride home and hop in the car. My brother has all the wheel related tools, so he was able to throw a new spoke on and true it. I'll be good to go for a while, but ultimately, I'll be building a 36 spoke wheelset. My track record with 32 spoke 700c wheels has been less than ideal.
Now to track down a 36 hole 105-SC or 6400 hub set and rims to lace them to.