I don't have much of an opinion on these tools. I bought it and used it to sand the floor at my family's house on the island. It was about 60 square meters and I initially sanded it with a 40-grit, then 80, and finally 120. It turned out really well. I also attached a couple of 5-kilo dumbbells to it and it sanded almost by itself. Of course, it produced a lot of dust because I didn't have a suitable vacuum (I broke a regular household one that I had), but I also came up with a solution there using a blower/vacuum and blowing the dust out of the window (fortunately, there are no neighbors nearby).