I bought this amp about 4 years ago from Amazon - I use it all day, every day and it's still as good as new. The tonal quality is superb. It has amazing power - I have never turned the knob above half way round, even when I want to have really loud music. Nice positive feedback on source selection dial too. I have it connected to a Sony Minidisc deck and Sony CD deck. The remote for this amp allows basic fuction control on these other decks. I remember reading a review in What Hi-Fi magazine and this amp got 5 stars.