First, the build quality is solid. You can take it on a stage, stomp on it and it will take it. The expression pedal and the foot controls are really responsive.
Next, the sound. You have to play around a bit to get an original sound, and even then it is not top-quality sound. But hey, you can choose from almost any genre, and it will produce nicely distorted sound. The variety of effects is mind blowing, and it even has a looper! What more could you ask for?
I would highly recommend this pedal for guitarists who like to experiment with their sound, since this pedal can produce music in a huge spectrum of tones, distortions and effects.
Last but not least, you can extend it with an extra pedal with two more foot controls, and you can also plug in a second expression pedal. You can programm all your sounds on your PC, and have the foot controls programmed as well to do whatever you want to.