i tried yamaha once and didnt like it.. maybe it was just my teacher's style - he just does a few demoes, hands out song sheets and then let's everyone play together, with the occasional background track. now the problem is everyone practises at the same time distorted with no control on volume at their own pace, i cant even hear myself! so after practise time we have to play together again, synchronised... haha it's truly mayhem coz i doubt the rest had good practise as they cant hear themselves too..
now there's this other great teacher at yamaha whose name is spencer, heard he conducted his class much better.. totally different story but last i heard, he stopped teaching new batches so can concentrate on his playing in a pub
right now i would recommend justin ho at allmusic. view the other thread on him =p