The Buyers Check List is a great idea/tool.
My first impression was "how useful!"
After reading down the list it became apparent to me that I didn't have a clue to as what exactly I was looking for to differentiate quality between excellent and bad. It would be nice to have a quick description of each thing to be checked off. Maybe even a link or two for an in depth overview where needed.
It would be easy to look at the kitchen sink and say "looks good". However, given details as to what to look for, like; is it sealed and secured into the cabinet well, are all the pipes secured from the underside, are the knobs working, and turn in the appropriate direction, is the drain plug there,.. I think a laymen could make a better and more standard answer. Quality reviews are always in the details.
Also, If you added a column for notes, it would better complete the list.
Just my two cents, of unsolicited advice. I'll definitely come back for the list when it becomes time to look at a new RV.