I don't have any issue, if I remember correctly when I stuck it, I used super glue for better grip.
It has never come off on me, and I've had it for months... if you slam the door, it's logical that it won't hold, but if you close it carefully, it will stay perfectly fine (I have 3, kitchen, bathroom, bedroom)

After a few uses, it comes off and even on a bathroom door that no air can find... It's not worth buying!

After a while, the sticker that sticks to the floor ripped (after 4 months, though it was not used much, I would say very little)

It is sturdy, sticks very well to the floor, and does its job as a stopper.
However, the magnet is too weak for relatively heavy doors that I installed it on (front door, aluminum balcony door). If they touch the stopper with the slightest force, they bounce off without catching.

The sticker from the magnet came off after one day (the one that goes on the door). I had cleaned it well before putting it on (it's not the first time).

It is sturdy and sticks well, does a perfect job of stopping, but the magnet is somewhat weak - to hold the door, you have to gently touch it, if you push it even with a little force, it bounces.

Quite good construction for its price. The sticker on the pad that sticks to the door came off relatively quickly. However, I replaced it with a piece of high-quality double-sided tape and now it doesn't come off at all.

It's garbage.
If you don't put a screw to tighten it, it's useless with the adhesive unfortunately. I bought 3 pieces and threw them away

It is very good as long as the weight of the door is taken into consideration (e.g. a lightweight wooden one is okay) that will be used in order to be able to hold it and take into account that it is installed with adhesive (a pretty good type) and not with screws