Like most other folks here, I wouldn't pay too much attention to the various "star" rating systems. The #1 sales figure says it pretty well. The Monty isn't the absolute top of the class in some respects, but it is near the top in most, and the final choice for more buyers than any other brand.
Based on your intent to go shopping this weekend, and if you haven't done so already, I would highly recommend a book on buying RV's Available as an Internet download..
Quote: The RV Buyers Survival Guide." Ex-RV sales manager
Bob Randall reveals how to get the best deal from an
RV dealer. Don't pay too much. Available as printed book
or an Internet download. (instant eBook)
http://www.NewRVer.com/rvbook.html
End Quote
We used it to prepare for our Monty purchase, and think we saved quite a bit of uncertainty and even a few $$ by using the info it contains.
Good luck and enjoy the experience!
Best,