Well, I have to say that I never had any kind of problems with Bittrex.
Nethertheless, seeing what is going on lately and all those guys saying their account has been locked and talking about the difficulties they have to withdraw funds... I decided to stop using it and move my funds to another, more secure and reliable, exchange.
Trust is everything in cryptoworld, if you loose it... it is almost impossible to get it back.
Good for you & hope you never have, me too didn't have any problem for months until I have them. They disabled my account 19 days ago without any notice, after being trading for months (tkt #555400). Support is almost completely mute. Technical problem are not excuse for going silent, tech problem always exist, that why PR & CM valve was invented. There's 1000 examples of exchanger just openly acknowledging their problems & talking to users.
They may have very tech capable people but management seems to be very sloppy & not prepared to face their success.