I was very skeptical about buying this 5 inch grinder. The reviews seemed pretty good and the few that gave a bad review seemed a little suspicious to me. I'm impressed with the smooth ride, the 5 inch pad compared to the 6 inch pad and it's lightweight so it can be used with one hand. The American made Detroit DA grinder that was replaced requires two hands to operate, the 6 inch National Detroit I have is made in the USA but costs over $250 to buy new . Overall I am very happy with the performance of this product as it is made in China. And finally, some have complained that it's noisy? Is there a pneumatic tool that doesn't make noise? My National American made Detroit makes more noise than this little pup.