glad you made it home ok.
1. seat comfort?
2. ease of driving?
3. mpg decent (within sticker values)
4. enjoy the creature features (radio, etc)
I'll chime in based on a 450 mile drive home from the dealership two weekends ago.
1. The seats are exceptionally comfortable. More so than my '09 Sport Edition, with more width and bigger / deeper bolsters. In fact I pulled into a rest stop and put the seat way back...then slept like a baby. I could never have done that in the 4th Gen.
2. It's remarkable how much different the 5th Gen drives from 4th, and it's very easy on you. The steering with KDSS feels more exact than XREAS. While the initial response to acceleration off the line is much quicker in the 4th Gen, once you are up to speed the newer model feels more solid somehow.
I don't have to put the seat all the way back now, and the additional head room plus the more vertical windshield make the interior feel much larger.
3. I was driving pretty easy and varying speeds a lot for break in purposes. That being said I averaged 23.82 MPG, and I have to say the green ECO light really helps there.
4. Call me crazy, but I thought my previous non NAV / non JBL radio sounded better than the NAV / Entune one. The NAV screen is noticeably smaller than my wife's Venza. Plus it doesn't show the lines as you're backing up (maybe there a setting that can be added for that?).
On the plus side the Optitron gauges are wonderful, moreover the info screen above the radio is as good as you could ask for.