This is now my favorite tool in my shop! It works beautifully and now I'm really looking forward to sanding down those crooked areas that are so difficult for me as I have arthritis in my hands. The 5 different grinders are easy to swap out, and the grinder itself has storage space and tools to swap them out. In terms of noise, I think it's one of the quietest instruments in my workshop, but then again I have poor hearing so I can't judge. :o) Changing the grinder is easy, which is very important to me, and I think the price is reasonable. I just bought it so I don't know how long it will last with normal use but it seems very well made so I expect it will last me for a while. I'm new to all this woodworking so I don't have a lot of experience with different tool brands but I love this thing so I don't regret spending the money and buying it.