Speed reading does it work?

Reading faster does save you a lot time but does it make you really understand what you read ?Won"t you actually miss some important details and need to spend more time to re-read. I heard BAC college have some speed reading workshop does it help you all in understanding more ?Does it work well?

12%20AM

I use speed reading to glimpse though the subject before I focus on something that needs to be focused on.

I did agree with you, that could save some time exactly