I have had numerous losses. To the point where I have stopped running CAT entirely. Maybe if I babysat it more it wouldn't happen but I wanted a bot that I could set to aggressive at a low number (.5-1%) and walk away. With the constant freezes and loss of the ping pong status I ended up holding a ton of alt coins that were less than half the value I bought at. When it worked it was fine, and generated some small gains for me. When it hung I had to spend a lot of time going through the 30+ open orders and sorting out what the actual buy/sell was supposed to be and manually putting them in. Then I was stuck waiting to see if they would ever be filled so I could go back and actually start trading again. I was on the sidelines for days in certain currencies waiting for it to bounce back to something reasonable when I could have made more trades in the lower ranges.
I am not saying this is anyone's fault. Cryptsy has had a ton if stability issues that have led to most of the hangs. I just want to warn people that despite a lot of the sunshine and roses here, there are serious potential drawbacks. Don't trade anything more than fun money at this point. I am certainly well in the negative given the .8 BTC I paid for it
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-Paul