Follow up on post by Buzz, flew a 900 last week.
Generally I was impressed! Plane seemed much more stable about the pitch axis than the 800, and seemed very "smooth" to fly. Hand flew it a lot, liked it. The roll trim and rudder trim were spot on, no need to mess with those at all. Power at TO seemed decent, and we did both 5 and 1 flaps TOs. I was gonna post my "Pitch Awareness Report" from my first TO, 2.03 pitch rate lol... guess that dang report did me some good!

Airco seemed to hold temps better than the 800, I was able to quickly set (there were already FO temp cheater lines penciled in!) and forget. And it appears there is not a cold spot at row 10 anymore, it has moved aft to around row 17 which makes some sense.

Luggage in cockpit-- seemed the height of the luggage spot was and inch more, maybe, we had no issue rolling two in there. However, I would NOT want to put my bag in that closet behind first class we're supposed to, as a commuter!

Landed decently, I ran the power a bit longer than I might as I didn't want to be the first scrapee. Working the new FMS panel with VNAV button and Fix moved, and no climb/cruise/descent buttons, was a pain at first, but should get used to it.

Flight att told me the aisle was narrower, and harder to roll your bag down, I didn't try though. And they were telling customers the new bins didn't hold as much, which isn't how I understand it, but they were ready to start checking bags at 50% full as they thought the bins were smaller (first time for them too).

In all, though I didn't like flying halfway across the country at 300, it seemed like a nice plane.