I've started the online lesson last December. I'm a beginner, but from what I can see so far, It's well worth the money, it will give you tons of work to do, and if it's not enough, just take more lessons per month. I'm working 2 hours a day on the exercises, I never took any online lesson (for anything) because it's usually a waste of money. But I have to say, after extensive search, I signed in, and I'm pleasantly surprise. But as Deltadiscos said: "you will only get out of it what you put in".
Vin