I got the official ps ones when I got my first edition bundle and they come and a pack of 2 and only cover the screen part of the vita but it has worked great and not trying to raise up anywheres and does not affect the touchscreen controls.
The official Sony protectors are, without question, the best. They greatly reduce smudges and it has a guide when you put it on so you get perfect placement. It is a must. Best SP I have ever seen for a handheld.