My compressor came today. It had a break-in procedure that said to open the regulator valve, don't attach any hoses or accessories, turn it on and let it run for 30 minutes. After a just a few minutes it built up 150 psi, shut off and didn't come on again because the pressure never dropped. That just seemed weird and like maybe a pressure release valve should have also been opened so the compressor would have actually run for 30 minutes.
Oh well. It seems like a nice compressor. It's not terribly loud and seemed to run pretty smoothly. It did vibrate itself across my garage floor a little bit during the few minutes it ran.