I read the RSD Forum when this one is down, or not very active. I've seen some of thier material. I think you can learn a lot from them, but I have some reservations, which I'll list below.
Basically, I think it's pretty good stuff, although it's a little too oriented toward the club for my taste. And thus more youth oriented. As a 51 year old guy who lives with his girlfriend, I'm not going to be making it a priority to go hit the clubs to improve my "game".
Tyler's a bright guy, and he's good at teaching inner game and such. He has said that identifying yourself as a pickup artist is about as pathetic a thing that you can do. But the thing is, if Tyler isn't a pickup artist, I don't know who is. He seems to be obsessed with perfecting becoming a PUA. I know that's his job as a guru, but for a normal person that would be taking it too seriously and investing too much into it. Is it really that important in life to put up Wilt Chamberlain type numbers as far as scoring with random girls?
At one point, he supposedly formed a relationship with a girl, and had a couple of kids with her. I've heard he since broke up with her, but I don't know for sure. Supposedly during the time he was with her, he was still going out and getting laid, which is something I don't respect. I know he's a guru, and had to still go out and show his students how to get numbers and makeouts and whatever, but to screw around on his girlfriend, that made me lose some respect for him.
He's 32, so I don't know, he seems to be promoting this lifestyle where you're forever going out to the club. That's his choice certainly, but wow you would think at some point that would get old and you would grow out of it. Going out to the club every week, once you get to a certain age, just sounds like a huge, pathetic waste of time to me. There's got to be better, more productive things you can do with your life.
But to learn seduction material, his stuff is definitely worth a look IMO. I'd actually say RSD is probably at the forefront of PUA theory.