This is my first 2x42 grinder but here are some thoughts I have about it.1. Platform: Mine is not 100% flat. I finished some small 1.5" diameter parts, the center of the product didn't sand because the plate was slightly concave. I bought a steel plate and epoxy glued it to the existing surface and that solved the problem. The part plus shipping costs about $20. To me, that's the biggest problem this car has, and it's kind of ridiculous if you ask me. The whole point is that this surface is flat and the manufacturer is wrong. 2. Speed: I wish it had a variable speed option but there isn't one so you get what you get. 3. Power: This engine can be turned off easily. can slow the tape down pretty easily if I apply enough pressure on my part. 4: Design: I wish the design was better for you to change band faster. I go from 180 grit to 400 grit and then intend to use finishing tapes. Replacing the straps is a hassle as you have to remove the platform and the "protective cover". I've permanently removed the protective case and can swap out a little faster, but still not fast enough. Another issue I have with the design is that the body goes around the bottom wheel. There is not enough space for the masking tape between the bottom wheel and the body. There is probably a gap of around 2-3mm and these finishing bands are much thicker and will not fit. I hope these thoughts help you with your purchasing decision.