Sorry, I'm getting in on this one a little late.
I have climbed with the same pair of cobras since they first came out. I've racked up over 60 days a year for the past 6 years with them. Mostly between grade 4 and M8, and they haven't broken yet.
They have lead nearly every route at Frankenstien and on Washington. They have also accompanied me on FA's and Long difficult stuff in the Bolivian Andes. One of the best tools I've ever used!
There were some breaking problems with the CF Black Profit when they first came out, but they were recalled and I haven't heard of any cobra failures.
My other tools are Ergo's. Great tool! I think a lot of you would be surprised to see how many top-end climbers are getting on alpine routes with Leashless tools.
Last year my roommate had Vipers and for the life of me, I couldn't get them to stick on the first swing. It made me look like this...
He didn't like them either. And just maybe, you bought them on Consignment at IME!
Here is the real-deal! Anyone out there who is thinking about buying tools! BD, Grivel, and Charlet haven't changed their pick design in years and you will always be able to find new picks!