Yea, I have tried it for several months & as far as im concerned, "It`s worthless". I didn`t get any results with it. I know because I track everything. Don`t waste your time with it!
I've heard from quite a number of people that it doesn't work at all. Luckily, I haven't used it myself.
Its a scam I wrote about it here http://financial-independence.net/you-tube-mailer Is youtube meant to be selling email addresses