The first thing I noticed was that the belt rollers are made of plastic. I am not sure how durable they will be, as my previous machine had metal roller that were starting to break up. Upon using the machine I find that the motor is not as powerful as I thought it would be it drags its feet when sanding material. The operating instructions booklet is a photo copy on shiny paper with a lot of reference to numbers on diagrams, the numbers are very faint and hard to read which makes it hard to follow the instructions. Apart from my observations the machine is well made and works quite well, and a direct relationship to the cost, which is reasonable.