Had several on corners for over 20 years, well worth it for all the damage they prevented. But had to remove them when we repainted. Original adhesion was good enough to pull small pieces of drywall off with them, but not surprising after 20 years and easy to patch.
Bought new ones, but they would not stay up: new paint is Behr Premium interior, matte finish. Waited 5 weeks after painting, still won't stay up. So resorted to using some dots of clear caulk every 18 inches, and that did the trick (have been up for 4 weeks now, holding strong, and already took a couple of hits from grand kids playing) . I still recommend these, they took a lot of hits over the years from kids lugging toys, me moving ladders, etc. and none ever cracked, but saved me a lot of drywall corner patching that would have been needed without them. I'd give these a 5 if I hadn't had to add the caulk.
Use them, but plan that you may need to add something to adhere them if your paint acts like mine.
Easy to Install, Functional, Sturdy