I bought another assistive device for ukulele from Amazon. I'm always interested in what is out there, particularly as I currently have two students with finger "differences" that will start ukulele next year, and have had several students break their chording arm/wrist and need an assistive device.
This model is sold under a number of different brands, for approximately $20, and is best avoided.
While it works, as does the Uke Chord Changer, I still like the square buttons and chord choices of the "generic" chord changer--which is also less expensive!
I bought this device myself--it was not sent to me for review.