Rating = Poor.
I bought one of these last summer and loved it. It was very quiet and easy to use, and had more than enough power. It was a dream to use, and extremely portable. I used it for about 15 hours over a number of days, and then put it away for a short while. I was diligent in my shut-downs, and always drained the tank when I put it away.
When I got it out againac ouple of weeks later, it failed. The motor smelled, it ran very loudly, and then it shut down. No problem, as it was early in the warranty, right? Wrong. The manufacturer would not honour the warranty, and I was stuck with a noisy, smelly compressor that didn't work - after only 15 hours of easy use.
Luckily for me, my supplier stuck by me and he replaced the compressor himself, at his cost. Needless to say I did not get another Dewalt, and my supplier does not carry them anymore. The product seems well made, but it is not. And any manufacturer that will not stand by their product does not make a product that I wish to purchase.