Bittrex is an American cryptocurrency exchange.
with high volume and lots of pairs for tokens and coins.
Bittrex security is one of the best, to do your trade it is mandatory to complete Kyc first, this allows Bittrex to maintain security from malicious attacks using anonymous accounts.
Buttrex uses a cold wallet that is very unlikely to be attacked by malicious activity if it is combined with the obligation to do kyc to trade.
no delay in deposits or withdrawals, all works well.
the only drawback is that the android app lacks a lot of fitue, it's like a very simple application, hopefully in the future it will be updated periodically.