Believe what you want to.
I'll take G.Levi up on one his previous replies when fending off questions as to the numbers;
"...When Krivit asked Giuseppe Levi, a physics professor at the University of Bologna who has been checking Rossi’s work, for data, he had a surprising response:“People will start to make any kind of funny analysis on it, and then I will have to answer this funny analysis…If you don't want to trust these numbers, don't trust them! It's very simple.”
Read more at: http://phys.org/news/2011-08-controversial-energy-generating-lacking-credibility-video.html#jCp
Yes, it was good advice. Levi got tired of answering the questions and said “Believe it or not.”
Kind of like me and man made global warming. I have not yet been convinced.