I ordered this after getting rocks from another country. I was super excited to use it, but found out that it takes a ridiculously long time to get the rocks smooth there are several stages with different powders and it鈥檚 super loud. We had to move it into another room and shut the door then realize it was just going to take too much Power Hydro wasn鈥檛 worth . Re consider an other option for rock resurfacing鈥 unless you have a garage and you plug it in there and let it run鈥.I used it for a few days then quit it鈥檚 been in the box ever since. It makes sense logically you can鈥檛 surface a hard rock quickly but too much for me.