Thanks guys!
I just texted a friend who's into flight simming: "I just spent probably two hours in FS2. I am just blown away. I flew a bunch of the other stock airplanes (F/A-18, F-15E Strike Eagle, MB-339 jet trainer, Learjet, a stunt plane, a biplane, and P-38, almost all for the first time) around the Kennedy Space Center area, and it's just a magnificent sim. The smoothness (other than occasional hiccup, which I suspect is texture loading) is really something, and the "look" at any kind of altitude looks very commercial simulator-quality (at least in the CK area; most of the rest of the US does not have anywhere close to that resolution). At the moment I think I like it better for "my purposes" (boring holes in the sky) than DCS. I had the F-15 at 63,000 feet!!! That's a first. (According to WP the service ceiling is 60K feet, and it was slowing down at 63K, so it feels well-modeled). At the moment I would actually recommend it over MSFS, due to the stock aircrafts' fidelity).."