This is a straight tool, easy to learn and effective. Doesnt give you the options that other more sophisticated options do, but, those are much more expensive. Also, it's easy to combine with the Behringer S100 182.
Pros: solid build, easy to learn, cheap, and nice for creatively changing sound in real-time.
CONS: at this price, absolutely none
PS: after some months of frequent use I noticed some notes go out of tune. May this be a defective unit?