Well I downloaded a Trial version of FS Nav today and it really adds another dimension to flying the PMDG. It makes great flight plans, gives you a moving map diplay in the cockpit which you can follow as you are flying and automatically creates the flight plans for the FMC. The flight plans are much better than the stock plans that FS9 gives you and you can add or subtract anything you want. Also has a bunch of Sids and Stars that you can chose from an a up to date database.

Yep! I agree. I have been using it a few years now and you can't go wrong with it..

Bob Sure FS Nav has a lot of brillant features and i use it in every flight since a couple of years. But for planning the FP it has its "bugs". I do that with FS Build in the meantime. To be exact: I use a webplanner within FS Build and then (automatically) export it to everywhere: FS, PMDG,PIC, Squakbox, FsNAV...so here