IK Multimedia iKlip Xpand

It does the job and is more affordable than it's competitors. The spring seems stiff enough to hold even heavy tablets like mine, which is good.

I attach mine to the centre pole of the mic stand for stability, rather than the extension arm (which might make it less stable). In doing so, you are kind of limited in how much you can tilt a large tablet because it doesn't stick out from the actual stand very much. It's okay, but I do have it tilted to it's limit when in use. Ideally, I would like if it had an extra inch or two reach... That's what she said.

This holder I purchased was my first, and it is a great holder in as far as I didn't feel like my tablets would fall out, it has great stability, the only con with this holder is it's maneuverability to get the correct angle, more so if you're an acoustic guitarst/singer, who wants to see the pad but not have it blokcing the view of the audience.