RyanJames170 wrote on Nov 23^rd, 2012 at 7:35am:

what other bugs are there with the CDU? how major are they?

As far as I know, there are no other bugs with the FMC (at least none that I have ever had). There are two other bugs, however, both of which generally occur after loading a saved flight: the first is that you get a hydraulic system warning, and the second is the RAT sometimes deploys, occasionally without any way to un-deploy it. That being said, I think you'll find it suitably complex: I fly NGX a lot, but I never stopped regularly flying the 767 until the 777 came out to indulge my long-haul needs, and I still fly it when I have time.