I bought a drill from them. It burned up the first time I used it. I sent it back and they sent me a new drill that performed in exactly the same manner and once again I sent it back. They sent me drill number three and it lasted two days and repeated the burn up process. They did send my money back. I bought a six foot metal break before that. I still have it and it works fine.
I have purchased and used quite a few tool sfrom Grizzly. Some are good, some are not. I have had good success with their 48" Box and Pan brake, their metal bandsaw, and their electric shears. Some of their pneumatic tools are pretty decent as well. The drill press I bought from them absolutely sucked though. I called them and said I was not happy, and they would not take it back because it had been used. I asked how would know it sucked if I didn't use it. We gave it away and bought a Craftsmen that worked great. I also bought a milling machine and lathe from them as well, and they worked great.
They are importers. You are supporting Hop Sing and co. That said, they run their company pretty well. Just keep in mind there's a reason for the prices on many things. Some are terific bargains and others you get what you pay for.