Great ... Especially if you need MIDI Control
Of all the TC-Helicon devices below $300, this is my favorite. I need MIDI control for my setup, and this has just the essential stuff necessary to control the harmonies and effects. In addition, there are numerous "deeper" selections for effects that aren't really covered in the manual.
I recommend this highly if 1) you want TC-Helicon quality effects and harmonies at a low cost, and 2) you play MIDI keyboards and/or like using a MIDI controller for your effects and devices. I play guitar, but use a MIDI controller. If you play guitar but don't use MIDI stuff, you should look at the Harmony G-XT instead.
Minus one star for not having more flexibility for specifying dry and wet output preferences by preset (this is done globally only, and effects are still not 100% wet). This is limiting if you like routing your effects through a mixer, but its certainly not a show-stopper.