I did a TB search on this and didn't turn up much. Looking at the product description it seems to have a lot of good features. I'm interested to know whether the speed and tempo of playback songs can be changed independently. Can you slow down a song and keep it in the same key? Can you raise the pitch of a song (e.g. to learn a drop-tuned song with a regular-tuned bass) without changing the tempo? Has anybody used this thing? What's your impression? Are there other similar products worth comparing it to?