I bought a 15 a couple years ago. At month 14, a tire snapped all the lugnuts and departed the unit through the sidewall. Long story short, I found that there was a recall on the exact model, for the same thing only one year off mine. I called CR to have them reimburse me for my damage and change the other three hubs. Had to fight tooth and nail with them but they finally covered. When I picked up my unit, I showed the Service Manager a seam that kept separating even after I re calked it. He kept the unit in and did tests that Lippert recommended. It failed so they opened it up. Found that CR failed to put lumber in the channels on the trailer base that the connecting lag bolts go through. This caused the bolts to bend and snap. The separation caused damage that had to repair. The repairing shop, and the extended warrantee came to the same conclusion. CR refuses to acknowledge any fault. Not through with CR or the extended warrantee program.
I suggest another brand.