Bad customer support and no credit card support.
I tried booking a flight, but it would not take my private VISA card. I went to the online chat, and the rep wrote that the system detected my card as a Corporate, so I could not use it. He could not prove that it was a Corp card or anything, so I asked them to fix their system but this guy was to simple and kept replying "We are sorry The system detected as Corporate, so you must try another card" 5 times. Horrible service.