Roadtrips and general opinions

Hi everyone,

I'm looking into getting my first sienna and would love some opinions from current owners. I'm looking for a '15-'20 sienna xle or limited. This will be my first van. When my wife and I were expecting our first, my manager suggested we get a minivan because he had one with his kids and loved it. I kind of scoffed at the idea until I went and sat in a 3rd gen xle and loved it immediately. Since then everyone has been trying to convince me I should get a midsized suv but I feel the sienna can't be beat.

I have a few general questions.

What are your opinions on your siennas? Best years/features? Worst years/features? Things look out for when buying?

My wife and i took an 1800 mile round trip in our 08 crv last year and it about killed us from discomfort. After that experience, i really want a couch on wheels. How are they for like an annual roadtrip vacation with the kids? Fuel mileage?

Also I tend to keep vehicles for 10 yrs or so. How many miles have you seen on a 3rd gen?