Hi, Susan, I have the 2500 159". Yes, I am driving to Orlando for Eukanuba. I don't have an a/c yet. I am getting a vent installed next week, and an endless breeze fan. I have enough room that I can carry extra crates for ta king the dogs inside the building. I may end up getting an a/c installed down there, lots more places that are experienced. I'm putting a swing away hitch hauler on the back so I can carry a generator and extra gear.
I haven't been all that thrilled with gas mileage but i have the high roof and tend to go 80

I LOVE the fact that when I go around corners, there's no shifting of contents. I can fit 11 suv type crates (42" long by 21" wide) (I built a platform for 3 across the back, and can double stack 4 along the side.) Under my platform I have several wire crates and my grooming table. On top of those crates I have a couple of xpens.
The only thing I really hate is not having a little platform for cups etc like my Chevy did. The cup holders are on the floor. I have my ice chest in the middle that I use as a table.