I have Veloce Power shift shifters coupled to Centaur everything else. I do not have a huge number of miles on it (maybe 1k) yet, but it works well, I have no issues with the single downshift, but that is user specific. I prefer it to Shimano 105, but again user specific. Would I buy it again? Yes.

Bigger than the shifters, the Power Torque crank is lightweight, but a PITA to remove. If I were doing another build (which I am always contemplating), I would get a NOS ultra torque crank. They are heavier, but easier to take on and off. With NY road salt, I do not like having a crank that is difficult to remove for cleaning.