When I unexpectedly found myself needing a stand to hold my Boss GT001 during live work, I adapted this device for use. It has worked well enough in this role. I have no complaints. It has only dumped the unit to the floor once, and that was because I wasn't holding it while loosening the apparatus.
Pros: It's adjustable. Will hold things it's not designed for. It held my Amazon Fire 10" tablet very well when I used it a couple of times.
Cons: It can be a little tricky at first to figure out how to mount a tablet, but it works well once you figure it out.
I have used this for a couple of years now, and it has served me well.