I buy this to refinish the hardwood floor on a 100 sqft porch area . I do 3 pass with a 80 grit and a final with a 120 . this sander perform perfectly . it be fairly quiet , though you 'll still want earplug for extend use . it be well balanced , and do not get overly hot . change paper be easy . the bag collect most of the dust and compact it nicely . it work so well I use it to refinish a large work table the follow week . what a breeze . it take about 15 minute to sand the top and two bench with 80 , then 120 grit . it be not a finish sander , so I use a orbital sander with a 120 to take out a few scratch , but that be quick because it be just smoothing , not removal . the only strange thing be that the box be already open , and the sander have dust on it when I receive it from Amazon . I send it back the first time because I do not want to pay full price for a previously return item . but the next one from Amazon have the same thing - open box , dust on the sander . I can only guess that the factory test it and then leave it in that condition . why they do not at least put a factory seal sticker on the box I have no idea . but the sander itself work so well it redeem any packaging issue .