Speed Reading?

Chacham writes "Anyone here have success with Speed Reading? I've seen complaints about less comprehension, that it is uncomfortable, and that it's just plain hard to do. I've also seen people say it is invaluable. What are your experiences? I am particularly interested about reading technical resources, but I am curious overall as well." We've actually asked this before, but it's been three years, might as well take a second look at it.