You do know that several members here have been buying from GMG for a while, right? I've never heard them say anything bad about the experience.
I had a debit card compromised a couple years ago and I'd used GMG. The only websites I'd used that card for were Amazon, Newegg, and GMG.
I still use GMG because hey a deal's a deal, but I pay thru paypal.
Anyways I found Metro to be just too clunky and awkward. I didn't think it looked particularly good (worse shades of brown syndrome than an id game) and it ran terribly. STALKER was all kinds of better.