Anyone getting any edge with knowing Market Depth

I know there are several forex companies that offer market depth, MB etc...what I what to know is anyone have any strategy that is working just because they know what the market depth is doing.

Personally the only use I can see with knowing market depth is that you know how liquid the pair is in regards to what you are trading.

Any thoughts?

In my opinion the short answer is no. FXCM would have us believe that their market depth tool on their level2 platform gives us an edge. But in reality at the retail level of trading it is essentially useless. They pitch it as a scalper's tool but I've seen their resident scalping expert (really nice guy) try to use it with seeminly totally random results.