 This is our 2nd Sienna.  The 2018 model is a great, a good solid van, but miss all the nooks/crannies our 2010 had for storage, big drawback...it had a door arm rest that lifted up for storage, a smaller console for nick nacks, and this one has no extra storage under the 3rd row seats when seats are in the down position.  The a/c is not powerful enough.  The driver’s vent can’t be position directly on you.  The turning radius is even better than our previous van.  The rear window is a bit smaller though, so we bought one of those panoramic rear view mirrors.  That helps a lot.  All the safety features are a plus, but miss the sonic beep when pulling close to a post to park like our other Sienna did.  Must make a correction... the sonic beep DOES work when parking.  Absolutely not a fan of the black carpet.  We ended removing the black floor mats and replaced them with grey rubber mats that hide the dirt better and are easier to clean.  The center console is too deep, plus the black interior makes it difficult to find things.  We ended up using tall, white plastic cups to store things in them, then labelling the cups.  All-in-all, we are pleased with our 2018 Sienna Limited Premium, Toyota makes great cars.  I’ve been buying Toyota’s for 45 years!!!  Sure do wish the Hybrid was available...SAD!!!  They will not be released until 2019. ☹️P.S.  When we drove off the lot with this van we didn’t notice it was missing the roof rail crossbars.  We confronted the dealer about it later.  You would think a top of the line Toyota Sienna Limited Premium that costs almost $50,000 would have the crossbars included!!!  I had a nice in person discussion with the manager of the dealership’s Internet Sales.  She was kind enough to agree to add the roof crossbars at no charge.