I've had three sets of FSA cranks - two Gossamers and one SL-K Carbon BB30. Gossamers are crap. Even with loctite, the left crankarm comes loose constantly. I didn't have any real problems with the SL-K but I sold it before anything happened. I'd recommend a SRAM or Shimano crankset any day of the week over FSA.

I think FSA makes nice stems, seatposts and handlebars, but that's about it.