My husband and I decided to invest in this grinder to prepare our very old wooden deck for finishing. Now that the cost of lumber is so high we cannot afford to replace some of the badly needed rotten boards. This machine did an amazing job cleaning the top layer and saved us a ton of money on lumber costs. We started with a small hand sander, it wasn't enough. This machine took over the back-breaking, grueling, and relentless work and sped it up 1,000x. I have used other rotary sanders in the past but this one works beyond 5ft. Last weekend my son used it to repair drywall damage caused by a roof leak in his house. This allowed him to sand the walls very comfortably without having to kneel or climb stairs. No need for stilts or scaffolding. Here, too, we have saved ourselves a lot of time and effort. All the features of this tool work great. It has a solid construction and solid construction. The machine is designed for a long service life. She gets the job done and gives us professional results every time. In every way this is a great tool! absolutely worth the price!