I didn't experience with the site you mentioned. All websites are look like legitimate .So it is hard to tell whether it is legit or scam. If you are not sure or have any doubts whether the website can be trusted then exit from the site and take your time to investigate further into the website .To check a site is legit or scam you and rating about the site by the Google search. To check the website is secure use the site Webutation.net you will get more information about the website. Get the "whois" information from WhoisXY.com to know the administrative contact, technical contact etc.
Looks like shitty glass, thin. They might package it well, but how long will it last in your hands? You can tell by pics, selection, and pricing that its of lower quality.
I have ordered 2-3 different pieces of glass from them. I like their selection of cheaper glass and good prices.
I have never ordered from the place mentioned in the op, but since i have a few successful orders from gogo i figured i would suggest it as they are legit