Coinbase lacks real customer support.I understand that they are going through scaling issues as their customer database did explode in numbers over the last couple months but like others pointed out whenever there is a dip or an ICO happening their exchange site is down;ultimately on your end you can't utilize some opportunities that arise from those situations. Additionally,like I mentioned a second ago,for thousands of their customers who face issues withdrawing fiat currency,their customer service lacks actual responses since all of the messages they send are automated emails. In my personal case,it took 2weeks and an external complaint to consumer financial protection bureau for them to reply back and actually solve my problem. So in conclusion,I don't support them and I am closing my account with them and moving on to Kraken/or other exchange sites.