I bought this the other day. Will hold any size and probably most android phones as well. Can rotate 360 degrees to be displayed in any orientation. My impression is that it's very sturdy at a fairly cheap price. The bendable arm is bendy enough but rigid enough to hold it's position even in rough terrain.
I've had this mount for about a year now. I've used it for several different phones. iPhone 3G, 3GS, 4S and a few of the Androids that I've had HTC One S, Galaxy S2, S3 and it has fit them all. Nice part about it is that you can move or rotate it to get it in just the right position in your vehicle that's comfortable to you.