Without doubt JamVox is one of the best audio interfaces on the market. The download from the set up disc to laptop was smooth and trouble free. The transfer of music from laptop to the JamVox is one of the easiest I've used (this includes itunes, JamVox on-line and Windows media player tracks).
With some headphones plugged in you can play at high volume without disturbing the neighbours! A little tweaking of the mixer unit on the laptop was required to stop an appreciable humming/buzzing sound from the built in speakers/or your headphones when trying to play along with a downloaded track, but once done the JamVox is actually a very good piece of kit. Writing down the settings helps set it up quicker next time you play.
There are endless combinations of amplifier/effects pedals, some superb and others very subtle in difference. Each can be adjusted, though of course you have to use your computer mouse to adjust. There are drum loops and a metronome, plus tuner, and the guitar pickups can be made to change from say single coil to humbucker, etc. Everything can be recorded for future reference.
Two play along discs are also included (1960's - 70's and 1980's - 90's). The GXT technology enables you to remove vocals from a track, or the lead guitar, etc, though it takes a lot of practice to get it accurate. Lead guitar can also be removed from the track and varied in pitch or tempo to enable you to practice the piece. All in all a very good investment for less than £100, and no exterior amplifier is required!