So we own a 2005 Honda Odyssey EX. Very superb vehicle, completes its tasks extremely well!
Today, my dad got to rent a 07' Grand Caravan, with approx. 10,000 kms for a business trip. He gave me a ride to school in it... and WOW. I was expecting ALOT better. Suspension noise, it didn't feel "stable", ride was not as isolated as the Odyssey's, engine noise not as pleasant, and who still has an antenna sticking out?... It definitely felt like a 10 year old vehicle. I have definitely been spoiled by our Odyssey.
But I have to be fair here - I have seen ads for BRAND NEW 06' and 07' Caravans for approx. $16,000 and up. You can't beat that value... you can buy 2 for the price of an Odyssey!

So if you need a basic people mover, I'd say a Caravan is a good buy. Throw in the extended warranty, and your good.