I have been using a battery powered random orbital sander for a few years and recently decided to try a hard air handheld sander to see how it affects the comparison between fatigue/performance and comfort. I've come to the conclusion that you can do a lot more with this type of grinder without tiring your wrist or hand. I was able to grind huge 7x9 tables with ease and get great results. *** Make sure you have a strong enough air compressor as it uses a lot of air. I was able to run this out of an 8 gallon 4.3 CFM HF tank.