They are having serious capacity issues at the moment. Recently they have disabled creation of advanced orders. That was the last straw for me. Their UIs have been slow and clunky for as long as I've been using them (2 months). Opening a margin position is sometimes a problem, because their margin pool is empty, and there is no way to know that until you try to open a position, so you end up spending time manually bruteforcing what is the most margin you can get.

They have not been hacked. That's the only thing going for them, as far as I'm concerned.