I've had several different types and sizes of air compressors over the years, and one of the best (and still going) was an El Cheapo I got at a backwoods Wholesale Auction House. I think I gave about $65 total for it. It.s a 1.5 hp 3 gallon "Hotdog" style with the twin horizontal tanks like a hot dog about to be dropped into a bun. It's red, probably made in China and so far the pressure regulator has failed and been replaced once with a universal model from Harbor Freight Tools for $5.00 and the on\off switch assy fell apart from the vibration but I just put it all back together and secured it with nylon zip ties and it still works today. It puts out 40cfm at 90psi and I have run every kind of air tool imaginable including a 3\4" impact without much concern. Do I run out of air, yes. Do I care, not really. I'm not running a pit crew so being able to hit it hard for 30 seconds with any impact is usually enough to break the bolt\nut free and it just spins off a little slower, but like I ssid, I'm not in a hurry anyway. Does the compressor run continuously, usually. It was supposed to have a intake filter when I unboxed it but somebody over in Japan is probably still using it on his motorbike, so I just did without it all these years. I got it in 2001, so it's seen use for over 12 years now. I loaned it to one of my kids and it got turned on it's side and I think all the compressor oil leaked out and it locked up on him. I just refilled it, poured a little oil down the intake and let it sit for a week and then plugged it up and turned it on and she purred like a kitten. Vibrates like a locomotive and sounds like a 747, but work, oh yeah, all day long!