I’ve written pretty extensively about our experience of using extender sleeves. Here’s what I dropped on another recent thread, before rehashing too much:
Here’s my review of the 2 Extra Inches extender that is our most-frequently used. We also have the Extra Girthy but she has to be in the very particular mood to take that one and I just used my VIP reward code to get the 3 Extra Inches - haven’t used it yet, but looking just out the box I don’t see how it will be an inch longer than the 2. Even if it’s not bigger, I can’t complain about having a spare around for when the favorite eventually wears out.
I’ve provided quite a few other comments around playing with extenders outside the review if you want to skim them here.
Hopefully that covers most of the pros and cons, but I love slipping one on for some extended play. For me, the desensitization is a feature, not a bug and allows me to “keep up” when wifey is using her favorite vibe (Womanizer Pro40/We-Vibe Melt) on her clit so I can last, and also a little extra length helps with some positions where flexibility is required or I’m prone to slip out. Happy to answer any other specific questions you might have, but I think the review linked covers a lot of ground.