Sienna from what I'm told is the most unreliable of toyota products. I happened to look at one just out of curiosity, and I found the interior more than lacking compared to just other toyota vehicles. I'd say worse than the avenger int erms of materials. Caravan is supposed to be a somewhat decent vehicle, though still not exceptionally reliable. Better to stick with a good crossover like the Edge, Equinox/Terrain, or Traverse/Acadia, at least in my opinion.