Hi, Rodrigo, I use a Paasche VL, double-action, siphon-fed, and a Sears Craftsman 1 HP compressor, 3-gallon tank, maximum 125 psi. I bought that particular compressor because I can use it with some air tools, as well as with the airbrush.
I like the brush, but if I were looking for a new one, I would get a gravity-fed brush. I don't really use the siphon attachment and jars; I use the cup. And when it's mounted in the port, it sticks out to the left or the right. That makes it a little cumbersome to grasp, I find. But it's a minor issue.
I agree about being careful about price. That is, I wouldn't necessarily get the cheapest airbrush you can find, on the idea that it's just for training and you'll soon replace it. I would get a good brush, one that you can train on, and one that will last a long time.
Hope that helps!
Brad