To address a few concerns I've seen to newer Glyde users (this is just from my experience so far)...
Regarding shipping, yes shipping will always be slow. Personally if I'm in a hurry for a game, I wouldn't order from Glyde. It's 3-4 days for seller to get the envelope, another day for it to be shipped back out, 3-4 days to go from seller to you. Then there's Sundays and holidays thrown in there. I generally expect 1 1/2 to 2 weeks before I see my game. But other than being a cheap gamer, I'm also a patient gamer with a backlog, so it suits me just fine but may not suit you.
Regarding returns/disc quality, I have bought about ten games this year and only one has arrived in a condition other than described. I emailed CS and explained that my excellent copy game was very scratched and they apologized and gave me the option of either 1. Return the game or 2. Take $3.75 refund on the game. I decided, after installing the disc to make sure it worked, to just take the partial refund as I was having a shit week and really didn't want to deal with it. So I was satisfied with CS resolution, but not having gone through with the return I have no idea if I would have been charged return shipping, but it really didn't sound that way in the email.