I received my FSA Gossamer compact crank yesterday, got it installed, and went out for a short ride on a few local hills today. It feels good to have a little bit lower gearing when I need it! Shifting is just fine. I don't notice any difference. Moved the Shimano 105 derailleur down a bit to meet the big ring, adjusted the cable, took a link out of the chain, and all seems good. It feels like it offers about the same low gear as my other (Campy) bike in the 39/29 combination. I don't know how to check the gearing equivalents mathematically, but it feels about the same. I'm very happy with the quality of the crank and the detailed info that came with it. (Now, I've got to go find some hills, and some time, to see if I can get myself in shape to do some riding on a vacation to Colorado next month.)