Depending on what currency you are going to trade. Not all exchanges have this or that coin. For example, I used the exchange as -
https://www.cryptopia.co.nz/Homehttps://exmo.com/https://www.binance.comI had no problems with them And a couple of times there were delays.And in General everything is fine. You can also read the reviews and on this basis to conclude which exchange to work with.
Agreed on Cryptopia, so far the best exchange to date. No problems, fast payments, I can highly recommend it. One of the biggest advantages is the variety of tokens, its almost certain that you will find the one you need there.