The problem with 4 ch helis is they are fixed pitch helis so you are very limited to what you can do with them, it won't be very long before you out grow them, plus they are a little harder to get use to flying compared to collective pitch heli. Fixed pitch helis fly by how fast the rotor speed is, when the rotor speed slows down the heli becomes very unstable.
You should have a look at the Blade CP Pro or something like that, they are a little more money but they will take you a lot farther when it comes to flying skills.

One thing to remember is, when you buy those knock off helis, you get what you pay for, if you buy a cheap heli, chances are your getting a cheap heli and you end up having nothing but problems.