One of my personal favorites.
I get a lot of funny looks when I tell people that this movie would make my top 5 list. The cast is just too good to overlook, and sure they were dealing with a silly script, they all brought their A game to their performances. I'm a huge Mel Brooks fan, so my favorite character has always been Mrs. White. Madeline Kahn is one of my all time favorite funny ladies, and she would always to bring it. The chemistry between all the main characters is an example of brilliant comedic timing, as even the jokes that weren't laugh out loud funny were clever and rolled into each other well (like the soup slurping scene). The most brilliant thing about the whole movie is the multiple endings though, which they couldn't have come up with a better device to make it feel like the board game. I hope I'm not the only person who holds this up in such high regard.
Stop trying to poke holes in the plot and enjoy the ride.