Mine is 5 years old now and I love this grinder. I have an old log home and I have been slow sanding (sanding) the old wall surfaces. I've been working hard with this grinder for weeks and haven't had any problems except that if you're using it really really hard you'll have to replace the backing pad every few hundred hours, so what, it'll take two minutes and you can get two packs of these for less get than $20. If you want a really good grinder that you can use and abuse, this is the one for you.