Scott, that's a loaded question! You say you already have bought the Aztek. Aren't you asking this question in the wrong order? Having buyer's regret?
I've never used an Aztek and everything I know about them is based on stories I've read. There are some who swear by them and some who swear at them, and there are enough of the latter that I can't bring myself to recommend them. OTOH, Brett Green of Testor's Model Workshop uses one to great effect. He's certainly better at airbrushing than I am! The link I posted above even has a workshop specifically on the Aztek airbrush. From the ample evidence available in those videos, the Aztek should be a fine tool. Brett Green makes his living using an Aztek. That's pretty darn serious!
There is a member here who uses a Kenny Roberts quote in his sig line that I have long admired:
A 100% rider on a 70% bike will always defeat a 70% rider on a 100% bike
This, of course, means the person using the tool matters more than the tool itself. And that is also true about airbrushing. Come to think of it, that member's nom de plume is paintswithbrush, which should prove that you don't even have to
use an airbrush to be considered a serious modeler.
Practice makes perfect and use over time will bring familiarity and confidence, and that will be far more important than the brand name of the airbrush you use.
The biggest negative I've heard about Aztek is that they can get gunked up inside the body, and opening the body voids the warranty. So you're supposed to send it back to the factory for refurbishing. That put me off of buying an Aztek. I want to be able to break my airbrush down to the individual parts and put it back together myself. And I have to admit a certain amount of confusion for all the different types of nozzles. My Badger has three sizes (fine - inks and very thin paints; medium - most thinned acrylics, lacquers and enamels; & coarse - thicker paints such as textile or craft paints) available to me, but I can do 99% of my airbrush work with the medium nozzle. Changing nozzles brings an additional layer of complexity into the equation, and airbrush is challenging enough as it is!