Decent space for family of 6. Nice interior, comfortable seats. Exc sound sys (prem.). So-so heat in MN winter. Good AC. Gets 26 mpg carrying a full load on hwy. The only problem is that the driver's mirror has become balky. NO other problems. Best reliability of anything we've owned. Nothing rattles or squeaks. I bought it primarily for the power. I was stunned at how quick the Sienna moved when I test drove it. More understeer than I like but that's FWD for you, replacement tires helped a lot. I'm buying more Toyotas!
Excellent power for a mini-van. Amazingly responsive engine. Great build quality (zero issues) and excellent reliability (one minor problem so far).
Any vehicle could be improved. Make middle/rear seat attachments to the same plan so seating could be rearranged in more ways. Tighter turning radius would help. Economy-mode shifting would probably help city MPG (seems to like lower gears). Rear/side visibility somewhat restricted.
† Edmunds.com received the highest numerical score in the proprietary J.D. Power 2014 Third-Party Automotive Website Evaluation Study℠. Results based on responses from 3,381 responses, measuring 14 companies and measures third-party automotive website usefulness among new and used vehicle shoppers. Proprietary study results are based on experiences and perceptions of owners surveyed from January 2014. Your experiences may vary. Visit jdpower.com.