It is a joke. It is supposed to be the equivalent of Nasdaq Level II so you can see the orders at each level.
I was watching IBM's open book and I rarely saw anything more than 5000 shares at each level, yeah right.
The 10 second delay makes this a total garbage of a tool, I thought it will help with thinner stocks, nope, the specialist has just way too many ways to work around it.
At the moment I don't have it on my screen unless I only have one position and I am really bored. Maybe someone will find a use for this crap, unless they remove the delay I really think it is nothing more than a cheap gimmick.