I use RF G2.
I didnt learnt to fly on a sim but use it as a practice tool. IMO, The planes that the sim comes with are too easy to fly, the key is to adjust them to make them fly like your own planes do.
Its also a good tool for orientation. For example, When I was learning TR's it really helped with the rudder and pitch corrections while the plane was spinning around.

I like it but there is no replacement for getting outside and doing it for real. There's no spacebar outside. ( reset after a crash )