My xB's only downside is the choppy ride. I love the fact that all four tall adults can ride with their hats on and not be cramped. With the rear seats folded down, trips to Costco or the nursery are easier than in any sedan. The noise level at high speeds is about the same as in my new Odyssey.
I had to replace the front seat bolts and stack 29 mm of washers under all four front seat supports in order to lift the seats high enough for the thigh support I needed. Adjustable seats would be a nice improvement.