I bought one of those "professional" regulator/moisture traps 5 or 6 years and like it - having said that, the first thing I did was to modify it. It's my personal opinion the nobody in the Far East knows how to make NPT fittings or NPT connections that don't leak - cure: New fittings and lots of JB Weld or Teflon tape - airleaks cured.
And I replaced the large clunker of a regulator with a much smaller unit I had in the shop. All in all I'm pretty well satisfied with it - Only other mod I plan on making is to replace the OEM guage (0 to 150 psi, in 5 lb increments) with another smaller guage (0 to 50 psi, in 1 lb increments) which will hopefully give me a little better control over the low pressure settings.
If I were useing it to paint 1 to 1 cars or aircraft, I wouldn't even thinking about buying it. How ever, for modeling, it's pretty well perfect because it does what I want it to do. And I can replace it several times over for less money than what a single item would if I had bought one made by, say, Binks.