I contacted their support and they are sending me a replacement with the thin lenses with a different frame I chose (for free). I can see clearly and the frame doesn't feel too cheap (I got a metal one).
If you do order and have any questions, just talk to the live chat and they'll help you out. Make sure you choose the size of the frames accordingly to your head size.
The glasses came with a cheap plastic case and a microfiber cloth.
The shipping tracking sucks, the website doesn't provide any other information, and when I contacted support they did not know where it was either.
Would I buy from this site again? Definitely. It's a great place to buy a spare set of glasses or even prescription sunglasses. I was quoted 600 at FYI Doctors, paid 60$ for the same at Goggles4U.
I am not affiliated with Goggles4U and I would definitely keep in mind the reviews others have posted here.