and I have been a fan ever since.
I had a provider use one as a "surprise" one time and boy was I surprised. I thought for a minute that my "surprise" was BBFS after feeling how natural it felt when she climbed on top of me and let me just kind of slip in. Good thing she was on top so I could actually see a bit of the FC sticking out or I might not have believed her that we weren't doing it bare.
It positively is the closest sensation to BBFS you are ever going to feel while using protection, and I for one am a huge fan.
I always carry them with me and use them regularly. I too only carry regular/male condoms as a backup method, and strongly prefer the FC2s if my partner is open to using them.
Not only are Femals Condoms way more natural feeling, but actually safer as well! They are less likely to break than regular condoms, when used correctly, and they also protect against skin-to-skin contact in the genital region more than regular condoms do, making them useful for combating the spread of certain STI's which regular condoms do nothing to protect against since they are spread by skin to skin contact.
Feels more natural- closer to barebacking- and safer for everyone! A win-win in my book! 
You do need to be careful to try them with an experienced lady before making a judgement call on them. Many ladies don't understand the concept fully or don't know how to use enough lubrication inside the condoms for them to work effectively. And the packaging keeps the directions really simple, IMO not giving enough directions really. For example, the directions on the package don't even tell you to lubricate the inside of the condom. That will definitely lead to issues like the ones described above, where the ring is sticking to the guy's cock and sliding in and out of the lady with each stroke- ouch! The ring is supposed to sit back against the cervix, holding the condom in place, and the cock is supposed to slide in and out of the stationary condom. Only with tons of lube added to the inside of the condom will you achieve this effect.
To put it simply, and perhaps a bit crudely, a Female Condom should act as a "pussy liner" and should never be sticking to the guy's cock and sliding in and out of the lady. That will not feel good and will leave anyone feeling like it was a bad (baggy, uncomfortable) experience. So make sure you try it with a lady who loves them and is experienced with them the first try, pay attention to her technique, and spread the joy of using them correctly!
I absolutely love them and think they feel awesome. I am also a super tiny lady and one-size-fits-all vaginal products never seem to work for me. Regardless, the FC2's work great for me and 99% of my clients absolutely love them! The other 1% is just so used to regular condoms that it's too weird for them to switch.
