i don't put a lot of stock in it, but i admit i do look at it. thing is you can never know the hold/money that books are taking.
Most of the sites that say they are showing the way the public is betting are only getting info from a very small group of books, and if you know the list it's a bunch of books that aren't generally regarded as being top books. With that said, you are only seeing the number of bets going each way, not the money/hold.
i used to use sportbookspy and now it just has a direct link through the pregame website, no having to sign in and all that garbage.