I eat at McDonald's sometimes. The restaurants are clean and so are the restrooms.* The food is clean, and I can't say that for a lot of fancier, more expensive places, believe me.

I like the new buttermilk chicken sandwich. And when heading off on long trip, there's nothing like breakfast at Mac's, with no cooking and no dishes to wash before embarking.

When I'm tired and hungry at four in the afternoon, there's nothing like one of their small hamburgers.

However, you have to be careful with kids. You need to watch and see if the kids are actually eating the food. Many small kids are enamoured with the idea of McDonald's because of the clever advertising. However, when the get the food, it looks different and feels different from what they are used to, and they don't want to eat it.

You will notice that they don't call it a "Tasty Meal," they call it a "Happy Meal." McDonald's markets happiness. (I think a lot of families today ought to be asking, "How often is my kid actually happy?" I think the answer would shock them.)
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* Always remember Erma Bombach's deathless advice on world travel. "Never pass up the chance to use a clean restroom."