Point is: Why getting a crappy Aztek when you can get a much better tool for the same price ?
I mean, those Aztek kit with 25 nozzle (that you will never use all, unless your nozzle are killed one after the other) cost about the same price as a Good Badger 155 or even an Iwata Revolution !
The Aztek aren't for professional, but are priced just like professional tools. My Aztek costs me $60 when I got it. Then my Badger 155 was $65 ! Can't even compare both airbrush. Finally, my Iwata HP-CP was $140, but I was ready to get something better for more professional use. For hobby, a nice Badger 155 will do the trick, for the same money the Aztek will cost you. It will last longer and be more fun.
Some of my friend tried airbrushing. they got a small crappy Aztek at $40 on Walmart and after 2 weeks they stopped. They didn't liked airbrushing. When they come here, I sit them in front of a model and give them my Iwata. Then it cost me a lot of money on pizza because they don't want to leave :p
You will not have fun with something you will have to fight with to work. It's such a charm to work with good tool. Lot of people say the airbrush don't make a good painter. I not fully agree. My Iwata have such a fine atomisation that it's basically fool proof (even me don't make mistake with it) It's hard to have problem when the paint flow easily at 10psi with a preset handle, while the badger needed 25psi and aztek 40 to get the paint flow. Anyway that's my point. Aztek are a ripoff.