We picked up our 8289ws on June 1st. We love it!
The furnace return-air issue was already fixed on ours with the vents in the stair risers. We ordered ours with the 15k a/c, ceiling fan, BBQ, carpet delete, and also slide toppers on all 3 slides.
I like the Revolution hitch, although I did have to spray some wet graphite where the plate rotates as it started to creak on our first return trip. I have a Reese 20k hitch, and the wedge that comes bolted to the Revolution works fine. My dealer didn't set that up for me, but it's not hard.
A couple of dealer-prep issues: Make sure your water heater is not in the bypass mode-you can check this easily by pulling out the 2nd drawer in the front kitchen lower cabinet (right above the door panel w/3 hinges) and then unlocking the guide releases to pull the drawer off the guides. This will allow you to see, and also to reach in and turn the water heater supply valves/bypass valves to the correct position.
I did have an issue with the brakes not being properly adjusted, with a couple of the shoe retaining pins breaking(?) and shoe retainer springs rolling around in the drum, but a local Forest River authorized dealer got that squared away for me with no charge. (See my post "8289 brakes coming apart
I've begun to replace the interior light bulbs with LEDs, starting with the ceiling fixtures above the table and the sofa-the incandescent bulbs are VERY warm (almost hot) and during the summer made the trailer hotter inside. The 15K a/c seems to hold its own-you can adjust the 3 vents on the unit itself, and if you close those, the ceiling air ducts do a pretty good job, even to the bedroom.
We continue to enjoy how smoothly the trailer pulls, and everywhere we go, people comment on the trailer and love the floor plan.
The only negative is having to run the kitchen slide out if you want to get anything out of the fridge during stops when you're on the road, but the island counter and sink are worth it.