So I've been trying this quite sporadically. I would say I've had some success. The best case being a night I went to bed at 10:45 and fell to sleep within 15-25 minutes while the previous night I went to bed around 2-3 am. Usually when I try to pull something like that my sleep cycle gets screwed up and I end up laying in bed for an hour and a half (significantly longer in many cases) before falling to sleep.
This method is a lot like meditating. Except in meditation the goal is to pick a mantra to focus one's mind and also keep the mind awake and alert. With this, you have to make a mantra out of not making anything a mantra.
I've tried focusing on my body and making all my muscles relax, and even though I achieved this I didn't fall asleep because my mind was still very active. I don't know if you guys have ever listened to one of those relaxation recordings with a guy's voice telling you to feel the warm feeling slowly move up your arm or something like that, but the voice on these recordings becomes the object of focus which makes the process of relaxation easier. With SKA's method there is no external tool so the process is superior (since you can do it any time any place) but also harder.
What SKA is doing here sounds relatively straight forward (don't think, don't move), but it is actually more complicated in a way that I cannot quite explain. It's almost like training your mind and body to make an effort to go to sleep with very little thought.
What I am sure of is that it helps one get to sleep and some nights I did have more vivid dreams than usual. Though I'm going to have to put in more consistent efforts to confirm that it has at least some effect on dream recall/vividness of dreams. I am one of those people who has never experienced SP but has had his most consistent lucid dreams through WBTB. They all fell along the lines of this seamless transition SKA described. I'm going to continue on with this method and try to build on it as I do believe there is something to it.