Alright, now that I've had some experience with this thing I can say... damn.
A lot of options available, one thing I don't like is that it's quiet (although I remember reading about setting the volume on it and I can't remember how). The sounds you can achieve on this are as far as your imagination will take you. I personally love the way it sounds on my amp, either in distortion or clean. I get idea's from tones and a lot of creativity is just flowing from me with this thing.
Pro's:
A lot of options (including a variety of tones, mod's, and presets)
Durable (pure metal, and weighs close to 10+ pounds I think)
Sexy (Can't say I've seen better)
Easy
Ability to record
Con's:
Cost (although it is a cheaper option then other multi effects processors)
Volume (although that can be fixed as well)
No loop feature (there should be one, no excuse)