Default [Q] Opinions on this screen protector?

http://www.amazon.com/Kingmys-Premiu...alaxy+s4+glass

I'm thinking about getting one of these but was wondering if anyone has tried them. They're significantly cheaper than other glass options, but seem to have decent reviews.

Also, does anyone know how big of a screen protector can fit under the lip of an otterbox defender if you remove the stock plastic screen protector?

Thanks