They all say the sensation is much better, but you just have to be careful they don't slip in to the side of the condom so it's probably not the best if you want to keep switching positions.
I found that you know how you hold a normal condom on his cock when switching position (well I always do, you know how clueless some guys are), when using the female condom just hold the "overlapping" part against your labia as he pulls out, then do the same thing when he's ready to reinsert, so he doesn't get a chance to go wrong (accidentally or otherwise.)
It sounds complicated to try to explain it, but it's really quite easy after a couple of times.
I might have to give them a try again if clients like them. Might help some of my older guys who have trouble with loss of sensation.