The Aztek is a good product and is easy to use however in the long run it will cost you. For the cost of an Aztek you could afford a high quality Iwata for less money $89.00 at-vs- $99.00 for the Aztek. Also with the Aztek you'll have to frequently replace the nozzles ($8-$10 each), return the airbrush body at your expense(postage), and endure waiting for a replacement while your product collects dust. Not trying to sell you Iwata, its just that after I bought mine several years ago I haven't even looked at the Aztek. I purchased an Iwata Eclipse HP-BCS for $89.00 at DixieArt and the shipping was free! The quality is so good I haven't had to replace, fix, adjust, return anything in over 4 years! I'm actualy saving money by owning my Iwata. If you don't mind dealing with the Aztek's problems and hastles try one. Traditional airbrushes I recommend to you that are affordable and perform very well for modelling are as follows in order of personal preference and first-hand experience:
Iwata Eclipse Series HP-BCS, CS, SBS /Approx. $89.00(versitile, user-friendly, high-quality, high-detail, high-performance, one-size does-it-all neddle/nozzles)
Badger 150 / Aprrox. $50.00, sets avail. at DixieArt.com (very affordable, easy to clean, good performance, extremely versitile)
Paasche-H Single Action /Approx. $30.00-complete sets avail. at DixieArt.com (most affordable, most versitile, user-friendly, easy to clean, easiest to maintain, very good performance with any paint, tough, reliable, consistant)
Greg Williams IPMS/Roscoe Turner Chapter Indianapolis IN.