I bought one on dx.com but it seems they removed it from the page; the exact name was:
Angibabe Premium Tempered Glass Screen Protector Film for Samsung Note 10.1 2014 Edition P600
I like it very much, the tab feels natural and you can stop worrying about screen scratchs and stuff. Finger detection works perfectly. Pen functions very well with the exception of on thing: if you don't use the pen perfectly perpendicular to the screen near the edges(about .5 centimeter) the detection is moved millimeters from the actual pen tip touching the screen. This problem may be happening to all tablets and I don't know it because i wont take the protector off but it seems logic that the detection is affected that way with a some space added between the pen and the actual screen. Theoretically this could be fixed with calibration on the drivers or kernel or whatever but i am no expert.
Anyway, if you stay away from the corners and the screen borders you'll be very happy with the results a tempered glass has on this device.