Last year for my 60th birthday, my gf bought me a Masi Gran Criterium S. Really nice bike fitted with Dura Ace except for the FSA Mega Exo carbon crankset. In the past year, the bolt has backed out of the left crank arm twice. And, I would periodically have dropped chains when shifting either up or down on the chain rings. Finally, in desperation, I bought a Dura Ace standard crank set. Problem solved. Shifts are excellent. FSA? Never again.