The Market Grille (or Market Cafe as it is displayed on the doors) is always a convenient option for us. The nights where you are not sure what to make at home usually end up in wandering the aisles of Hy-Vee, and a few times we have ended up sitting in the Grille's booths.
The food is nothing spectacular. Typically there are offerings available from the "to-go" counters in the store in addition to the brief menu. There is always the "burger of the month" option which has always been a larger than fair portion which doesn't fail to please. We were fortunate enough to be there while the "Grand Buffet" was available. Everything on the floor (pizza, Chinese, deli counter, etc.) was available for $11.99. Not a bad deal when it includes a beverage. The little one was allowed to graze off of our plates without paying for his own.
All-in-all, the Grille reminds me of a truck stop. The staff is partial to regulars, and even at that the service is slow. Almost seems like the "management" is treating the operation like a 5-star joint while the service realizes they are working in a grocery store. If it weren't for the "Grand Buffet," I would have given a 2.