okay customer experience with the occasional bargain price
The first game I ordered at OnlineKeyStore was out of stock, or no longer available for the price it was advertised at. So I never received a key, the automatic refund didn't go through either. Only after contacting support did I get a refund and then only as store credit, which is really less than ideal for an issue that is entirely their fault. With the second game I ordered the experience was much better, I received the code 10 minutes after completing check-out, and it could be redeemed on steam without a problem. So yeah your mileage may vary. If you find a good deal on the site, it might be worth it to give it a shot.