Although when the issues of best exchanges are been debated, we can go on and on to list the exchange of our preference but the user in position to make this decision choices and needs should always be considered fast as it's necessary what he/she intend using the exchange for that actually matter and not all the features we speak about.
Nevertheless what you highlighted above shouldn't be more in the discussion unless the OP has interested in withdrawing his profit directing to his/her local currency account. In that case they have to look towards local exchanges and not much of the global exchanges but when the exchange are fixed at global exchanges for trading purpose than users friendly interphase, easy communication via customer service and security has to become the first priority over other features