I bought my sienna in 2005 with 75K; 7 years later it now has 160K and is still running strong. In my opinion the sienna is rather homely when compared to other minivans, however it makes up for this with its excellent built quality and reliability. I have never had any problems with this van is the seven years that I owned it. It has excellent build quality both under the hood as well as in the body (very sturdy). It is not very fun to drive but I have yet to find a minivan that is. The sienna does have an excellent ride both on the highway as well as in the city. I am amazed at how well it has held up over the years.
Reliability and build quality
The sienna has a lot of blind stops due to the position of the post. It would be handy to have a fold flat third row seat.