We got our 2011 Honda Odyssey back in October. There is some kind of glitch in this model that is driving me nuts. If I only use the minivan for short trips for a week or so, the "low battery" warning light comes on, and all the auxilliary power (interior lights, headlights) shuts off as soon as you either get in or out of the car. When I called the Honda dealership about it, they said it is just a glitch that lots of people with this model have encountered. And they did nothing to look at it.
I have a complaint into Honda, and I will have the dealership look at it soon when I get my first oil C.. But now that I've had this car for a few months now, I don't know that I would buy it again. The Toyota Sienna offers more features for less money. I hear that it doesn't drive quite as well as the Odyssey though.
Good luck to you. Let me know if you have any more questions about the 2011 model. I like it, but I think it's over rated.