I've got the FSA compact crank and it works for me. I usually go for a mid 90's cadence and the top 3-4 gears I don't use except going downhill. On the low end, I appreciate that 34-25 when doing mile+ climbs. I'm not 20, just turned 40, so the TDF is out for me. Maybe by the time I've worn out my crank and cassette I'll be enough of a hammerhead to get a "real" double but until then, I'll keep the compact.

ps. I've done the numbers on Sheldon's gear calculator and I'm not missing much; the compact has almost the speed of a double and almost the low end of a triple; it's a very good option to have.