From reading reviews, it looks like their delivery is dependent on the game. I would not advise IGXE for Guild Wars 2 (US). I sent in an order and did not receive it. I contacted live support and they told me to wait 6 more hours. I did and nothing. I contacted them again and the same thing happened, I decided to give them a second chance. Nothing. Now, I contacted them a third time and requested a refund. They told me to "give them more time". I threatened to contact Paypal with a dispute/claim if they didn't. They told me they will cancel my order. If the refund doesn't go through then I will actually contact Paypal.
They will make you wait around forever and use vague terms that don't promise anything such as "if our supplier can deliver it, we will contact you". I haven't had issues with gold sellers until IGXE. Do not contact for Guild Wars 2 (US).