what should i check for an ap set when buying it and before leaving the shop?

What about sgp ultra optics sp? Anyone use b4?

so, u recommend or not? how much clarity does it decrease after putting it on? is it noticeable? if still so many fingerprints i rather get something like ultra oleophobic...

FINALLY got my note 2 ap from direct d. Wah the place crowded like market onli. Seems people in line there oso buying note 2...

Sifu's, is it necessary to fully drain the battery until the note 2 dies out for using it for the first time and repeating a few more times? Can just straight away charge when reach 5 percent or below?

If I am right once the phone fully charge it will automatically stop charging and won't overcharge right? I just leave it to charge overnight. It probably charges finish in the middle of my sleep, but I don't wake up to turn it off. No harm done?

My charger seem to have hissing sound as well. But only after when battery reach 90 percent or so. I can claim warranty then?