I agree to most of the answers I have see so far.
The simple answer will be: choose a dual action, gravity feed internal mix airbrush. The Neo is the response IWATA had about all those cheap Chinese airbrush flooding the market. It is better than a $20 Chinese airbrush but it still has some limitation. Bear in mind that it is the NEO for IWATA.....not the NEO from IWATA........They are certainly cheap, but if you can put a bit more into an airbrush I would rather recommend the Badger Patriot 105 or even better the IWATA eclipse HP CS........
I stumble upon a rather good website that had good info and advice.....maybe have a look and you will be able to decide what is the best airbrush for you!