My cousin has a Sienna. We knew the Toyota dealer, and we both test drove the Sienna. In the end, we could not bring ourselves to spend $5,000 more for a car that had fewer features than the Terraza. Dollar for dollar, the Terraza is a great buy! We've now had the car for 6 months. This is our third minivan (one Japanese, one American, all fully loaded) and I can tell you that this is the best one we've ever had! From the remote start to the wireless DVD player to the automatic doors to the dual climate control to all that storage space - Buick, you've hit a home run! Never mind that it also drives great and you can hear someone whisper at 70mph! Who needs an SUV? Great family car!