Personally, I prefer the female condom to the traditional condom. They are a tad tricky at times but once you have the hang of it... you have it.
For one they cut down on the drag of downtime to put on a condom when moving for oral to full intercourse. We all know that sometimes those few moments in the interim can get a bit awkward or cause an erection to become elusive. Also in duo situations, it eliminates the need to constantly change condoms. I know some women use then for anal as well. And, while it hasn't happened to me thankfully, I don't have to worry about a client slipping off a condom when I'm bent over.
They are a tad more expensive; about $2/FC2 but well worth it. I just ordered a bulk shipment today.
You might check out this older thread.....
I had the same questions a couple years back....
I love the female condom and the ladies that have mastered them !!!