What is it? Basically, it's a 16-foot guitar cable with an end that plugs into your computer instead of your amp. It should be plug-and-play for your Mac and PC (meaning no drivers to install), and the analog-to-digital conversion rate is 16-bit, 44.1kHz, which is the same as an audio CD. (As with any A to D converter, you will want to adjust your recording software's buffer size to minimize latency.) Recording your guitar sure doesn't get much easier or more portable than this!