I've had a Columbus 320RS for a year and have been out a dozen times.
We really like it. Being an early production unit, we had some problems, but Columbus responded and took care of them all. They have since improved their QC in the plant. I toured it last Fall and was very impressed with the people there.
As for the trailer, it's beautiful. It has so many standard features and "extras". I like the 6 sided welded frame, it's 100" wide, (most are 96"), it came with not only a convection/microwave, but an oven. The wood work and finish are beautiful. The shower, 30"X60" is AWESOME. The leather recliners are oh so comfortable.
PM me if you have any specific questions.
You will really like the rear kitchen unit. Best of luck and happy camping!
2013 Palomino Columbus 320RS
2007 Dodge RAM 2500 6.7 Cummins
Reese 15K manual slider
M.I.L. in Florida for good!!