Okay! Finally I got my package of the "new" Ultra Optics. Overall, I like it. Of course it has glare when it's off, but it's not buggy to me. I was a little bit worried about zipzip sound, but it's pretty unnoticeable unless I really pay attention.

I bet many people like the optics so far. I have been reading reviews on their product page (
http://www.spigen.com/tablets/apple...e-wifi-screen-protector-steinheil-series.html), and many people have bought it and liked it according to the review.
For the most, I'm so happy that I got all free gift along with it! It's a white snap on case. I posted a picture here:
https://forums.macrumors.com/threads/1381297/
Thanks for your advice!