There's a lot of garbage in there, but also some interesting stuff. I think in general I am really impressed with the tool, and the ability to slow down and speed up, etc. My only knock on it is that it is in tab only, which kind of sucks for those of us who try to steer clear of tab. But that said, I still find it useful.... On a side note, although I know this topic always starts a fire, I think the primary thing WRONG with tab is not that it is an alternate way of conveying musical ideas, but that it tells you *where* to play each note. With traditional notation, you have to figure out fingerings from just the notation of the pure note (where it is in the octave, which octave), but with tab, you are being told too much and don't have to put enough thought into it to really learn the concepts behind it. But there are some lessons on activebass (such as "Giant Steps demystified") that just offer up chords and don't give you any tab at all. Anyway, just ponderin.