I have had one for 2 months running 24/7. It's stable and has shown no signs of blowing up. I purchased it from a guy on eBay and got a good price for it. He got it from BA and sold them immediately because of that whole situation. It is the batch from February.
It never hashes below 995ghs and averages about 1010ghs.
For power, it does use up about $45-$60 a month where I am. So there's been a little head room. I'm selling mine soon as I will be able to get most, if not all, what I played for it back.
It's a fun machine to look at and take apart to see what's inside. But if you're in it exclusively for profit, you could do better.