Nowadays I think the biggest problem is to open the account at all. I am trying to do this with Gdax for a week now, the automatic face verification tool is simply not working. Bitfinex and ItBit is not taking new clients at all and I heard that Bitstamp is processing new clients for weeks on months.
Globitex, if you can open the account in one day, process the payments fast and provide good support - you will fly high