I went through it a while ago. It’s really good for establishing your beliefs and if you stick with it you’ll develop techniques that help you LD more often. While I never experienced any of the shared dreaming, I had many more LD’s while I was going through these excercises. Definitely worth a try
One thing though, you have to be serious about it. Just going through the motions half-heartedly probably won’t get you any improvement.
Interesting, actually, I’m starting this course, that means I will probably start a DJ on LD4all. =)
I’ve read a little and I’d say it’s really good for people who lost motivation, it starts with basics, which is good too. (Since I quite lost the basics to dreaming recently =_=)