Thanks for the replies.
I do charge it overnight. Once I start using it, it seems to run down faster than the Air. When I charge it while using it - always using the standard Apple charger, it seems like the charger just keeps up... The percent charged goes up very slowly. I'm surprised that it doesn't have a bigger charger than the Air. I do keep the screen fairly bright - about 75%. But that's the same as I set my Air.
I'll get used to what it takes to maintain a sufficient charge, but it's notably harder than with the Air. I find myself heading off to afternoon meetings with 16% battery or so, which didn't happen with the Air. When I plugged in the Air while at my desk, the battery charged quickly. The Pro just goes up a few percent when I use it plugged in.
Just seems like Apple didn't maintain the level of user experience with the charging rate of the Pro. I wish they had a faster charger, even if it were physically larger.