Hi, I'm new to the forums. 2 weeks ago I received my 1st fleshlight and I love it! I can't believe these products have been out for years without me knowing. I don't think I'll ever use my hand again. I chose the STU so I could get a case and be able to order sleeves. But that's in the future, for now the STU is good enough. The orgasms are so intense. The first few times I couldn't handle the intensity or prevent the orgasm but now I've gotten the hang of it. Even though I haven't experienced the other inserts I highly recommend this as the 1st fleshlight to get since you can't get a STU sleeve. That's all I gotta say for now.