Have been using them for 10 years now with no problems, if anything they are better than specs as you have full corrected vision.
I fly long-haul and have switched to daily disposables, useful as I get bunk rest on many of my sectors. The lenght of time I can get away wearing them is surprisingly long (10 hours, not recommended though) for a dry atmosphere.
They take a while to get used to though, but stick with it, it's worth it.