It definitely sticks to the wall pretty tightly once you create the vacuum by flipping down the hook and Im using it on a tile wall with some paint drips that I didnt specifically clean. However, I must have a high pain tolerance because I barely felt any pain. Fix lack of companion app with ability to customize EQ Settings and update firmware - CHECK. This pillow actually put me to sleep very fast witch is a big plus for me since I had sleep issues. This game is absolutely amazing! Not many can say that they have a 70inch television or an in-home movie theater. My one complaint is that it is too easy to set it beeping while in my pocket, not a good thing when you are in a meeting. Mic quality is good, at least that is what I am told. And I didnt like the big toe wrapping strap design. A lot of wind noise but it was still better than our previous experiments with radios and helmet speaker kits.