How is it?
It's a really good system.
As is common in a lot of Mark Hermann games, there are a lot of intentional subtle nuances in the rules that are key to fully utilizing your forces, but it takes a thorough understanding of the rules (probably after a few failed operations) to fully appreciate.
The telescoping time through the operations and battle cycles--really tough to grok without playing through.
The battle scenarios are essentially tutorials.
I am currently playing the Guadalcanal campaign solo, just to get a feel for how to organize and pay for an operation. I believe that this game would shine in a 2-player campaign game, but that would be quite an undertaking.