The interior of the '11 compared to the '09 is a whole 'nother level. We had no intention of ever giving up the '09 until I sat in the new one and had to have it.
Being as it is my primary vehicle with 3 kids, it makes a huge difference. And it is like the universe listened to every little, minor thing I may have disliked about the '09 and fixed it.
One of my favorite things is the locking hinge on the tailgate door. Now the door does not swing closed when trying to load/unload it. (no more nylon rope hinge...)
Also, the higher/softer console and longer padded armrests on the doors are something you need to experience. This makes looooooong road trips so much nicer for the driver/front passenger, and we did not realize how bad it was before this.
It is the little things that made a HUGE difference and persuaded me to trade up.