It's not a real vagina. It's definitely different than just masturbating normally. Still confused. Update later.
Unfortunately I can’t say I enjoyed this particular Tenga product. I really like the Flip Zero and was looking for something with a simpler design. The upside of the 3D is that it is very easy to clean, and also a bit more discreet than the Flip Zero. The downsides are that the interior texture is too rough for me (I bought the Module version) and the whole thing feels like it wants to slide off of me all the time, which makes it feel rather unwelcoming. I’m not sure if getting another version with a smoother texture would make a difference. I think the material is just not as silky and pliable as the Flip Zero. Also, I now realize the benefit of having some rigid structure around the soft part, as this keeps everything in place and gives the sensation of entering a vessel rather than pulling a sleeve around yourself. Judging from other reviews I’ve read, it seems like people enjoy this one, but personally I was disappointed. I would strongly recommend considering a Flip Zero if you are interested in buying a nice reusable toy.
TENGA 3D Module