This thing is great (as is its 2 counterparts which use the same inflatable but different posters) but I had 2 issues when it was shipped. My first issue was that one of the suction cups was bent (from packaging most likely) so one side would not stick to the surface while the other one did. This was remedied by removing the suction cup and putting some heat on it (I used a lighter, you can also use boiling water or a heat gun just be CAREFUL you don't overdo it and make sure you spread the heat evenly or else it'll burn the material). My 2nd issue is the actual inflatable itself, OtonaJP doesn't list the dimensions but the onahole slot is only 60mm so some medium to pretty much all large onaholes will not fit. Even when they do fit it's a pain in the butt... hah. I lubed the outside of the onahole to make sliding it into the slot easier.
Overall it's a pretty good product if you don't want something like an insert pillow which are about 3x as large.
This set helps you to quickly get the right mood and find new positions for your onaholes. Note that suction cups for attaching to walls are good but it's better to improve their suction for example by cleaning the surfase of the wall (or a mirror?)) and adding some soap to the cups in order to force all the air out of the cups. For the inflation it's better to buy a pump (foor air pump is OK). The picture can be used as an inspiration even without the booties but they help you to feel a kind of real interaction with a female.