My flatemate is infatuated with that book and has tried to sit me down in his room and show me his 30Gb, yes 30Gb of pick up lines including pictures of body stance, chat up lines and routinely watches the informational videos of the guy about how to get your mojo for the night.
This is what he uses, every night.
He says ''Hey, sorry for bothering you but we need a womans opinion. Is kissing cheating?'' Depending on what they say, you have this back story to develop. Your friends girlfriend went out and kissed another girl, is this cheating or just friendship? (Normally the girls say friendship.) Then you go on to explain that she has done this more than a couple of times, even though she says sorry to her boyfriend she keeps doing it.
He does this to like, 20 girls a night and it's not uncommon for him to ask the same girl the same question. And this is where the problem lies for me. While in theory 30Gb of information is great, it hasn't in practice even moderatly helped him.
I've been living with this guy for a half a year now, and I think it got him laid once, with an ugly girl that could be argued if he didn't even use the pick up line that he would have bedded her anyway.
For me, I think it's just a easy way to break the ice between a girl but the way to pick up a girl lies in your banter and the way you carry yourself. Thats why guys who are good looking can struggle to get girls and bad lookin lads are like a hot knife through butter. In theory again, learning the ways seems like it has merit in helping you, but in practice with my flatmate who lives and breaths this stuff and is by no means a bad looking lad has had no luck so even though there seems to be merit there, I don't think it helps.
I think most of the way to pick up a girl comes from your subconcious body language she picks up that is just natural and that just comes from the practice of talking to girls and confidence.
But hell, what do I know! Thats just my opinion, not trying to start a flame war here or defending my opinion, that just what I know about the subject and the lads who use it. =]