This thing is great!
I was putting up shelves and ended up overloading one of them--it crashed to the ground. I was going to go through the whole repair process with the mesh adhesive, putty and sanding, but I decided to give this little guy a chance. It was easy-peasy! It's just a simple little stick that you twist at the bottom to make the putty rise up, like Chapstick. It comes with a plastic putty knife on the cap that, granted, is not the best, but it got the job done well enough that I didn't feel the need to
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go fish around for my own putty knife. The instructions say to paint it immediately, before it dries, and no sanding. If I was going to leave the wall bare I probably would have been more of a perfectionist about it, but I planned on re-hanging the shelves about an inch and a half under the old spot, so it wasn't imperative that it be seamless. It ended up looking fairly good anyway--even the one whopper hole where some surrounding plaster had ripped out. Since I'm a renter, I didn't have the exact paint shade, though I did my best to match it, but if I had, it most likely would not have been noticeable at all. This was the first time I'd ever repaired holes in the wall. I'm happy with how inexpensive this product was, and how easy it made the job for me!