It kicks ass. Its this little cassete player looking thing that you hook your bass into, slap some headphones on, and practice away. I thought I'd try it out, because I like to download songs off the net and learn them, but it was a pain to drag my amp into the computer room then back out again. I thought it was going to be all muddy sounding, but it has a very clean, very loud sound. Its made by Dean, so they better be giving money for advertising for them like this!