I don't know for what purpose the other friends below got it, but I use these for posters and small frames, small hanging decorations, etc. for 15-20 years in 3 houses that I changed and they are very good. Without them, your walls will be a mess and additionally, I wouldn't be able to experiment with positions. In extreme weather changes, some may come off, but you always have 1-2 extra boxes to replace whatever came off (they break, it's not a problem unless it's right above a heating or cooling unit). In small pieces, you can also use half (cut them). Something worth mentioning is that usually after 2 repositionings, if it collects dust from the wall, it won't stick, but this is expected (for better durability, clean the wall well first) and fair (if it had a stronger adhesive, it would remove the paint when detached). Also, if something doesn't come off from a poster, don't force it upright and ruin the poster, but leave it in place and put a new one on top of it (nothing is visible from the front). However, even the most difficult ones can be removed with a little patience if someone sits at a table to deal with it for a bit. In old/damaged wall paint (e.g. ancient, not just 15 years old) and especially if it's oil paint or ripolin, it requires a lot of caution during removal or if you're afraid, don't attempt it at all because it may leave a hole. Very user-friendly and good product. I may have bought around 100 of these packages and I will continue like this :-)