I have a 2010 Coachmen Freelander which has experienced leaks - around a bedroom window, and apparently on the roof seams (selling dealer claimed to have fixed them). I had the RV Doctor in Fort Myers, FL attempt to identify the leaks and repair them. Their verdict was that the roof was shot and I needed a new one.
I have since lost all confidence in the RV Doctor's operation due to this response and the results of 3 other very simple to fix items that asked them to fix.
While the quality of the membrane used by Coachmen (mine is actually from the Forest River time, but is probably constructed of left overs from before the sale - 08 450 chassis) is about that of a cheap discount store picnic tablecloth (discovered when I replaced a vent with a Fantastic Fan), it didn't show any visible problems, except perhaps at the seams. I had all the seams resealed as a temporary fix, and have an appointment to have a spray on fix in a couple of weeks. When I bought the Freelander 6 months ago, I was aware of gollycollie's problems and factored a spray on roof fix into the purchase offer. For the 28' Freelander the spray on roof is expected to run about 4K ($150 per linear foot) and guaranteed for 20 years. I have to take the MH to the facility near Jacksonville, FL for the solution I chose. A competitor will come to you and do it on site, with what appears to be a similar solution. A third option I found was the "bedliner" application. My concern with the latter two options was the level of experience of those doing the application would be a luck of the draw.
As a super senior geezer (near the end of my 80th year on the planet), eliminating the need to ever again get on the roof, and the probability of ever having a roof leak was an easy decision.