I have several rigid tools and my answer as to quality is "it depends". Some of their motorized tools are really good quality (mid to higher priced miter saws for example) and others are not (some of the lower priced electric drills for example).
I think, as with most brands, if you buy the very bottom of the line, you're going to get a minimalistic, use once in a while kind of tool.
I do like Rigid tools far greater than how I feel about Harbor Freight. I bought a 4-1/2" angle grinder from HF and using it almost daily killed it in about a week. HF would replace it, but only after I ship it to their main distribution/warranty service location and they'd eventually send me another one. Considering it was $9 on sale with a 35% off coupon they mailed me, I decided it wasn't worth the hassle of shipping. I have a Mikita that's reliable as can be. I wanted a second one so I didn't have to switch between cut-off wheels and flap-disks so much.
While I don't own a Rigid grinder I do have one of their shop-vac knock-offs, and I'm pleased with it. I use the exhaust outlet to assist in closing my pool each year. I also suck up metal chards and chips off my machines and the floor (and my shirt, pants and shoes), and I've also used it for automotive purposes - after spraying a hot engine with degreaser, I've used this vaccum to suck off all the gooey engine dirt. It's sucked up soggy kitty litter, sand, leaves, water, car fluids, metal chips, spilled paint and mineral spirits, sawdust, cigarette butts and ashes, ash from the fireplace (after it's cooled down of course), knocked over cans of screws and nuts, drywall screws, etc.
So far so good.
I also have a rigid disc/belt sander station, and the thing eats the internal timing belt like you woulnd't believe, leaving the sanding belt unpowered. Rigid has replaced that belt (free of charge) no less than eight times by now, and it's not that much of a pain. I simply write to them using the form included with the machine (well, a photo copy) and send them the snapped belt and they happily send me a new one. My only complaint is the entire process takes about a month - from me breaking the belt to getting a new one. The stores that sell the units do not seem to service Rigid directly, mail order only.
