We have a 2014 Cougar but a different floor plan. Only problem I had was water got into he fridge compartment during a HUGE rain. Here is why. When you open the two covers on the outside of the trailer, there should be a lip behind the frame on the bottom. It should be caulked so that if water gets in, it hits the lip and it directs it back out....sort of like a backstop. Our lower access area had it, the top did not...at least it wasn't tall enough. I added a strip of quarter round molding, and caulked it up. Now if water gets in there it hits the lip/backstop and flows back out.
And one other thing, make sure the drain tube from the fridge is routed through the access panel so that any condensation from inside the fridge will drain out. Our was not and I did not notice it at first. Otherwise water will flow into the fridge compartment.
Overall, very happy with the rig.
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2016 F 350 FX4 4WD,Lariat, 6.7 Diesel
41' 2018 Sandpiper 369 SAQB
Lovely wife and three children