We've been happy with our Montana (our first one). No issues worth noting. No more or less issues than any other RV i've owned. Would I buy another? Sure, if we liked it. Would I buy an Open Range over a Montana? Sure, if i liked it better than the Montana. Will I buy my third Lance camper when it's time to replace it? Sure, if I like it better than brand X and Y.
Hard for me to be brand loyal with any mass produced assembly line product. As far as I'm concerned each one is unique. These aren't widgets spit out of a widget machine. Too many changes can occur on the line between hours, days, weeks, months and years. Not to mention the reliance on several other assembly line produced products that are put into each of these units. Way too many variables for constancy.