i like kraken, there is leverage there and other features, bitfinex also seems good, but there was an hacking attempt in the past, the one that is still somehow safe is only kraken to me
For me kraken is the exchange to use too. They have advanced features to make stop loss orders f.e.
In fees and support they are also outstanding. The withdrawal fee is a little high on the downside.
withdrawal fee for what? fiat or bitcoin? i remember that for bitcoin is the standard fee that any exchange use, and for fiat is only 0.09 cent