Not so much untrustworthy, but they introduced fees very suddenly today with (afaik) no warning at all.
Been trading since the start without fees (except on fast withdrawal) but are now charging for trades and all withdrawals.
Fair enough, they gotta make money, but the timing could have been a lot better and it came as a big surprise to a lot of people, including me.
Yeah, I wasn't expecting that so I decided to pull all my NXT and BTC from there.
In the process of getting my Ripple wallet funded to try
https://peercover.com/#/simpleGateway but still waiting on the confirmation from Justcoins -> Ripple, which seems to be taking longer than it should. I might have done something incorrectly, not sure.