Which exchange has dissapointed you the most?
The most disappointing exchange that failed me is yobit. There's a lot of people that are even complaining and not only me it's tested and I don't want to be pissed off again by this exchange.
And so far there's no other exchange that are putting their service into disgrace, I'm just trying to secure myself by not putting all of my funds into such exchange.
The possibility of an exchange to be hacked is still there and that's why I'm not dragging myself to become disappointed by doing this act.