I spent a good amount of time with this last night. As nice as the 'Ready To Taxi' option is, it really doesn't mean that you can jump in and fly; lots of little quirks that require you to know what the hell is going on before you try and come back down again.
Or even get to the runway. I used the 'Ready To Taxi' option to get it started after a brief (45 minute) familiarization with the plane and the manuals, and was still caught scratching my head when I couldn't steer it... Still haven't found where in the VC that I can engage nose-wheel steering, but I do indeed now have a hardware switch setup for it!
Also, I need to do a bit more reading about the speed brakes. I was assuming the default spoiler command activated them, but it seemed to show a different result in the VC display when I used a command versus when I used the mouse on the switch. And then when I toggled the button I'd assigned in flight, they obviously deployed, but on another toggle they didn't immediately retract? More like a 10-15 second delay, which I'm sure is required learning about how they work.
My (soon the be rectified) lack of knowledge aside, it's a very well done package. Sounds are great, textures in the VC are really, really nice, and after taking a block 90 model up a few times above Fallon, it flies like something where you really get the impression that it's a plane you need to learn a whole lot more about to become less dangerous and less dead!
My immediate comparison is to the Superbug (to which it compares as favorably as one could hope); however, in the Superbug you have this distinct impression that the plane is keeping you safe from harm, keeping you from doing anything colossally stupid, whereas in the Cat you have this impression that it's really just waiting for you to do something dumb so that it can show you exactly how inexperienced you are.
I'm looking forward to becoming much better acquainted with this in the months and years ahead!!