Crystal S.

The price is perfect if you need a half-decent pair of backup/spare glasses.
Being used to lens from optometrists, I found the quality lesser than what I was used to (but perfect for the pool or as a backup pair!).
At first, I thought the prescription was wrong, and customer service had me send the glasses back with my original prescription. I got a new set that was a bit better, but still not as good as the $200 ones I got from the optometrist.
The deals they offer are excellent, and one of the reasons I come back.

Lovely polite people who replied within the usual 1-2 business days.

Most sellers are honest, but Buyer protection time is not enough for an item to reach many countries. And some sellers will delay responses or claim they have to check with the warehouse and wait several weeks. Then the time is over, and there is NO appeal process. Even if the buyer sends you the wrong item and doesn't want to do anything about it, there is nothing the buyer can do.
This was my first time returning to dx.com after a year of absence due to a previous bad experience. And I promptly get a second bad experience.
I'm going back to aliexpress.com. At least they have an appeal process, even if the seller delays past the buyer protection period.