We've had our 320RS for two years (next month) and live in it at least one week out of each month. Last year it was a total of 114 nights (31.2% of the year). After our first trip following delivery we took it back to the dealer and left it a week for minor tweaks and adjustments. Later we took it in for 3 hours while they replaced the bedroom A/C unit (Dometic's fault, not Columbus).
Otherwise, it's been a wonderful experience and we still love it as much (or more) than when we picked it up. We got most every option and use every one of them regularly. We make monthly trips and never have issues in towing.
In the interest of full disclosure, the Akuret tires that came on it are horrible. We had two blowouts and after the second one I hauled it into Discount Tire and had all of the tires replaced with 10-ply rated Carlisles and we haven't had an issue since.
All in all - we love ours, we still have many people stop and ask about it and some pretty much invite themselves in for a tour (which we love).
Robert & Estha Shiflet
'12 Columbus 320RS - 2015 Ford F-350 King Ranch & 2010 Ford F-250 King Ranch
Nights Camping 2012 & 2013 & 2014 & 2015: 458 ~ Nights Camping 2016: 95 So Far