I use it for two months

After hesitating with the quadratic model merge noon I preferred the kenton solution because it has an external power supply which allows it to operate with any keyboard master.

Compact and lightweight, it's a simple device that simply connect to their keyboards (4 max) and expanders (both taken out) in order to obtain sound expanders on the master keyboard.
I had no problem, it works fine.

Its aluminum shell gives the impression of a product rather strong (I'll see in a few years ...).

With experience I will ever be that choice without hesitation.