For the price, this program offers an astonishing array of features - it's a fully functioning audio and midi recording studio environment complete with mastering effects, vst and directX support and re-wire. If you don't know what any of those are, don't worry, it comes complete with an array of built in instruments and effects so you can complete a song or track without ever going "outside the box".
Simply stunning for the price. And friendly. And the support (i've used both email and forum-based support networks for this program) has been brilliant.
At first any software of this nature seems complex, but once you delve in and get started, things just seem to fall into place. I kept finding things I wanted to do, expecting to have to buy one of the more highly thought of program (Cubase, Sonar, etc) but finding that I can do it here after all.