I have never been with anyone who has used this but I see it on some providers sites.   Does it feel better for the guy or the girl?

And you have this ring hanging out of you. That has deterred me. Trying to stuff the darn thing in while the guy is sitting there waiting seems odd. I guess in time and with practise it wouldn't be such an ordeal but I am sort of put off with the look of it.

In general, what's said about them is true: they offer much more sensitivity than a standard condom.  The other good thing about them is you can go back and forth between FS and BBBJ without a change.  Just be careful you are correctly "engaged" when entering or re-entering her.
The bad news is, you can see the outer ring of the condom hanging out of her pussy, which, to me, is not attractive.  If that doesn't bother you, got for it.
Inserting them can be done manually, or using a dildo or just put it over your cock and let her sit on it.
Last point:  there is some debate whether the FC can be used for Greek.  They were not designed for it but there are several studies out there suggesting it can be done.  No statistical results yet.  You can google it.

they are great..penetration feels better..you can pull out and go to BBBJ and back again without missing a beat..they are inserted easily..sure beats going through 6 or 7 condoms if you like pussy to mouth action..

I use them and always have them on hand. I also have the regular style as well. However I really prefer the female condoms for a few reasons:

Was it over your maximum size restriction??? lmao

Switching back and forth with condoms is a pain, especially if you tend to suffer from "condomitis," which can wilt your willie while he waits for the new raincoat.

Not really.  Only if you manually insert them.  But I saw one gal mount one on a dildo and stuff it inside herself, which was kind of sexy.  Another time, the gal just put it over my cock and sat down on it.  Not bad.  But the "ring hanging out of you," yep, that's a turn-off.

The feel is as close to natural as you can get while still being covered. The biggest thing is to use lots of lube for him and her. They are great for doubles sessions and back and forth from sex to BBBJ. I say try it you'll like it.

Still the ring hanging out, yeah, I will stick with the regular condoms.

You will get all sorts of answers.
I personally prefer the regular kind. Although FC's are a must try for doubles.
There are a few things I find annoying about them.

and I think they are fantastic.  I have had a very hard time coming with a regular condom and the switching back and forth to BBBJ was seamless.  Much more natural feeling for me.  It didn't even really interfer with my DATY.  My very sweet provider suggested we try it.  She used a glass dildo and had no trouble inserting it.  We just had to use a lot of lube.   I was concerned that it would not be as pleasurable for her, but she said she really liked them.  She did come a few times while we were using it too.  I agree that it looked a little strange flowering out of her pussy, but I got used to that pretty quickly.
I highly recommend them, especially for a less sensitive old guy like me. No other way to go, really.
The really big downside is that it doesn't look like I'll be able to schedule a visit with London the next time I'm in NO afterall. Dang.

...but since I'm just sitting here wasting time anyway:  FCs are great--for those things for which they are great.  Fantastic for pounding type activity--terrible for doggie (especially stand-up doggie).

As for insertion:  girls I know who use them, generally use a dildo (and lube, of course) as an aid to get it in there.  Once it's in, it's great for the guys--the girls I know who use them don't seem to mind...YMMV

I know most ladies leave it in, but I find it HIGHLY uncomfortable and virtually impossible to insert properly with the inner ring left in place. When I do occasionally use them, I go down on the guy with me kneeling on the floor. I stop for a minute and pour a bunch of lube into the FC and stick it over a long, thin vibrator and insert! Because I don't put lube on the outside, so it stays in place when I pull the vibrator out. I resume with the BJ and do a smooth transition to FS when the timing seems right.

It should be bent in half.. Kinda like a diaphragm...
You can't just shove that into any girl..

Imagine it getting pulled out suddenly... Not cool. Trust me.
Even a smaller one.

Really the whole thing sound like a PITA. Having to shove it in with a vibe and then mess with the inner ring and then to top it all off you have this unsightly plastic bag hanging out of your pussy.

My thing. I used it once and was sore for a week. Nope I prefer old school.

The insertion is not a pretty thing to watch . . .

Motha fuka! See, no one bothered telling me that shit lol. I still won't use them. They look retarded and if all I wanted to do was fk with nothing else, I would not bother lol. You have to remember I don't offer shorter dates, so I am not putting on 2 and 3 FCs for each date. Fks up more than the moment.