I bought this controller to use my electric guitar modeler in a context of playing live and in rehearsals with my band. It works perfectly for this purpose.
The controller is quite lightweight and compact, which makes it quite easy to carry in the rack where the modeler is mounted, or even in the guitar case.
Also use it to control a multi-effects unit in parallel. works equally well.
The Midi mongoose is quite versatile, I can use it with up to two expression pedals, I can power it with phantom power from the 7-pin midi cable (or with a 9-volt battery mounted inside), and all in one compact chassis that can even be mounted on a pedalboard to control an effects pedal that has midi capabilities (to change presets for example).
The quality of construction is quite high, nothing on the pedal seems fragile or poorly designed. the switches are soft and not too noisy.
It was a great purchase, I doubt I'll sell it in the future.