I have a 2010 2900D and it has the same floor plan as this, but with a jack knife sofa instead of the booth. It is not "26 foot" as stated in the listing. As the model number implies it is over 29 foot.... Almost 30ft. You can confirm that by the amount of RV hanging past the rear axle. Also not sure where the 5th and 6th person would sleep. It's only 2 beds.
The small triangular table is factory,,,, but I've never seen the wall above it covered in the pleather fabric. Maybe that was the fashion back then? Mine has the same white smooth material as the outer walls on that transition wall.
I do find the cabinet to be a bit useless for storage (I tried to store a set of sheets for the sofa there, but they fell out when I used the table),
I use the pop up table only occasionally. It's low to the floor and only usable by the passenger seat.
I use the triangle table top all of the time. I added a double QC USB power outlet on that wall and leave a wireless phone charger sitting there all the time. It's never fallen off yet. And it's my typical place to put the TV remote.
Larry