I had an FSA SL-K Adventure crank installed last year 46/30. The non drive side crank arm fell off after 100 miles and the crank was replaced under warranty. I was never really happy with the crank (it seem as though there was always a squeak from loose chainrings, bottom bracket or or crank arms).
Last week I had the crank removed and put the original Ultegra crank installed with a Wheels Mfg bottom bracket and absoluteBLACK oval chainrings 48/32. So far, the ride is amazing.