There are three hardware options in this lineup, including a Recording Studio USB audio interface for $119, a Vocal Studio with a USB microphone for $99, and a USB keyboard version called KeyStudio that goes for $129.
The USB audio interface features an XLR microphone and instrument inputs, as well as RCA output. It's basically a two-channel interface, in and out, with some nice big gain adjustment knobs up top, a switch for microphone phantom power on the back, and the option for a zero-latency direct headphone monitoring on the front.
If you don't want to fiddle with knobs and just want the most direct way to get quality recordings into your computer, the VocalStudio USB mic is the way to go. A metal tripod and leather pouch, also come included. As the name implies, this is an ideal setup for recording vocals or podcasts, but it works just as well for recording your guitar amp or pretty much anything that makes a noise. At $99, with Pro Tools SE included, it's really a killer value.