I use this daily and have just renewed my membership. A years membership is the same as buying 1 book at the music store. The music comes with accompaniments at different tempos and the quantity of music you can download and play is staggering. For a family with kids in music it would be one of the best investments you could make

These are not the cheapest lessons, just the best value. If you are looking for lessons on the basis of price only you will end up wasting your time and money.