I don't like those things! They feel so clinical like something my gyno would insert! Plus, if you get them in the wrong way & get carried away the guy can miss while he's stroking and end up bb'ing and neither of you would know. On the plus side, they are good & hygienic for doing doubles! Some guys like them . I guess they are less restrictive, but they should definitely be approved!
I've had the most easeful experiences inserting an FC2 right before vaginal penetration and using lots of lube on the inside and outside. Best of luck!
They were up for grabs for free so I ordered like 20 of them and I tried to insert one last night just for giggle so now I have 19. If I decide that I don't like them...ladies I am willing to part with them to someone who enjoys them.