I fly a Challenger 650 in real life and I am absolutely flabbergasted at the accuracy and detail that has gone into this aircraft simulation. I have two copies, one for my home setup and one for my travel MacBook. This add-on aircraft was awesome to refer to when I was getting my type rating earlier this year.

For comparison, I also have quite a bit of time in the Citation X, and the default Citation X model in XP is functional, but rudimentary. Bravo to the designers of this 650 model.