I've only done the trial version but I decided not to buy it not because of the content; the material is quite good actually and, considering it's for life, the price is fair as well. But the activities cannot be done through mobile or app properly, the recording won't recognize what's said, the written activities never goes on to the next, the platform only works properly on desktop PC and the whole purpose is that you can learn anywhere, whenever. If I can't use my mobile and be alone when recording my pronunciation or I can't answer the cards on my free time then the "anywhere/whenever" thing is null