Oh I loved Mona for all the reasons you stated
. She reminded me a lot of my grandma; just a lot of fun and definitely not stuffy like other people her age. I loved that Mona got along real well with the girls and Mrs. G. I didn't like the fact that she was only in 2 eps either because I liked seeing grandparents on the show, especially ones as old as my grandma was. Nowadays, "grandmas" are 40-50 years old.
Anyway, you have a great day too!