Started to use a tablet for mixing, song text and setlists for live use. Used this now for practice and once live. I am really impressed. Feels like high quality, you can move it immediately into the position you want, it stays put, even with a crazy guitarist singer jumping around like a man mad! Now I can make changes to the FOH mixer live while singing and playign guitar, read song text and move the tablet to the perfect position with ease.
Fixing the tablet to it is also an ease. Smart round holders are quick and easy to adjust, again clamping and moving in just the way you want.
I also have had clamp-on devices to mic stands slip on me or break because you have to crank them up like hell. This one is great in this regard.
Summary - buy it and you will not regret it!