Can't tell you anything about the Columbus (Forest River product?), but we've been full-time in our Grand Design Reflection fifth wheel for a little over a year. The only significant issue we've had was with a Lippert-supplied suspension component and that's across the industry for any manufacturer that uses Lippert components. What I can tell you is that, for a mid-range RV, the fit, finish and workmanship on the Reflection are good. We toured the factory last week and a Montana owner on the tour said that the Reflection frames (we were looking at 337RLSs) were much heavier and better designed than the frame on his Montana (and I always thought Montanas were good units). Anyway, what sets Grand Design apart from the rest is their customer service. Check out the GD owners forum at:
Grand Design Owners ForumThere are lots of good folks over there who can and will answer your questions.
Rob
U.S. Army retired
2020 Solitude 310GK-R
MORryde IS, disc brakes, solar, DP windows
(Previously in a Reflection 337RLS)
2012 F350 CC DRW Lariat 6.7
Full-time since 8/2015