My favorite feature of the Tenga Flip Hole is how convenient it is to clean. All you have to do is slide the locking mechanism off and you can open and clean the inside with warm soapy water and it'll be as good as new! It works really great for its intended use and on the instruction manual, that came with it, if you're not big enough to feel the full experience of the Tenga you can actually have it open and use it that way on whichever side you'd like, since the Tenga has two different styles which you can see in the product display picture.

As for my opinion on using the Tenga, it feels amazing when you put a nice amount of lube inside, although when you put too much lube, it makes a small wet sound which could be inconvenient if you're trying to use it secretly. The look of the Tenga makes it hard to tell at a glance that it is a sex toy. You can smell the material (TPR Silicone) and after washing it with soap it picks up the smell of the soap. The material is very soft and is made out of a silicone based rubber compound and should be washed before and after each use. The lubes you use for the Tenga should be water based and the Tenga comes with 3 distinct lubes. The cleaning process is quick and easy. You can air dry it while using the locking mechanism as a drying stand.

Also, when you use the Tenga, you can use a cock ring if you want, while using it, which enhances the overall experience and lets you enjoy the toy more. I use the Tenga quite often since it's easier to clean up rather than just using an open sleeve or my hand.

Just a heads up, if you use too much lube and you use the toy upright in bed, the lube may leak all over you. This has happened to me a few times.