I just bought one last month, hear what I can tell you so far:
While not silent it is extremly quiet, I don't think you will have any compliants here. Mine did come with a moisture trap but no regulator, so I did have to purchase that (less then $20.00). It is a small light wieght unit. I did have one problem with the pressure switch, but I called their 800 number and was able to speak to someone in their tech Dept. on my first call ( I was on hold for at most 1 minute!) and He was able to tell me on what to do to resolve my problem. Unfortuntely I am in the middle of house painting and have had little time to actually use my new toy so I can't give you a real report on painting with it. Hope this helps in some way.
The art of war is simple enough. Find out where your enemy is. Get at him as soon as you can. Strike him as hard as you can, and keep moving.-Ulysses S. Grant