I have not done the landmark forum yet, but I know several people who have and they have told me its the most powerful and life changing thing that they have done. Landmark is a little harsh at times, but its for a good reason. Some people call it a cult because they want you to sign up your friends and family and they call you and want you to become part of their staff and help out. But if you tell them to stop calling you, they will.
I have done similar work (but kind of different) based on the lifespring work and I can tell you that it will change your life if your committed to changing your life for the better. From my experience (taking basic, advanced, leadership, and staffing 3 classes), it doesn't have very much to do with being self-aware. These programs are for people who want to improve their lives, it doesn't mean you need to have any big problems or your not successful in your life.
I would without a doubt recommend the work to you and everyone else.