That just looks like your standard Campbell-Hausfeld gun, (also available at Home Depot)
I use them all the time, they're fine for pretty much any standard spray functions.
The only reason you'd need a REAL quality gun is if YOU'RE that talented to take advantage of it's options,
which usually is just a finer tip (for very fine work) and higher quality parts (that don't corrode as fast).
Besides one fancy gun I do have, I use those C-H guns all the time, they're fine guns, break down easy, clean easy, go back together easy, shoot easy.
I always though the better gun helped me because I had little spraying talent to begin with..Its funny how we all see things differently...