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Both my wife and I tried it. We were rebuilding after a Chapter 13 and it did give her a "boost" from low to mid 600s. It didn't do a thing for me. As a matter of fact, I had to write a letter of explanation for the underwriter last week. It didn't hamper my mortgage, I closed a few days later on Friday, but I guess this is so new that the underwrite was confused as to why my Comcast and Electric bills were on my EX report.
It works... I did it with an EX of 740, because I had a thin file and got a boost of 25 points to an EX of 765...