If you can belive Bittrex FAQ there are no deposit fees:
Deposits - There are no fees for deposits. Please be aware that some coins require us to move your funds to another address before we credit them. This means the coins network will charge you the normal transaction fee for this send. This is not something we can avoid.
source: https://support.bittrex.com/hc/en-us/articles/115000199651-What-fees-does-Bittrex-charge-
I know they aren't perfect lol. But at least they actually make their service WORK. Unlike Poloniex, who makes an update to their TOS and that's it.
I agree they seem very stable @mrbearbear . With a wide coin selection. One thing I do like about their platform is that they always have the usd price listed in plain sight for trading.
Hm. hm! Thanks for that @maruba . It costs me nothing to transfer eth and btc to Bitfinex so... that's pretty curious.