Mimi's is great!! Huge portions, delicious food.

Can't go wrong!
Millie's is very good, it's comparable to Mimi's but we prefer Mimi's.
McDonald's is walking distance on Harbor, standard menu but the dollar fare is harder to find.
IHOP, don't eat at the IHOP's on Harbor, food is fine but it is way overpriced. We paid about $50 for our family of four to eat there, the girls ordered from the kids menus and we didn't buy anything other than normal food, we won't be back.
Denny's, eat here, fast service, standard food, standard menu prices.
In the GW we like Bubba Gump (should have spent our $50 here), Cheesecake Factory, PF Chang's, I hope to try Fire & Ice when we are there in just over a week, I found a rest.com certificate to use there.
Farther down Harbor we like Joe's Crab Shack, Red Robin (altho we have one of these near home so we don't eat there too much) but these you need a ride, unless you want to walk quite a ways.
In DTD we love Ralph Brennan's Jazz Kitchen, we like Rainforest Cafe and we like House of Blues. We avoid Tortilla Joe's (we've eaten there a couple of times and been sick after) and ESPN (overpriced for what you get, but if you like to watch sports while you eat go here).
There is also a Carrows on Harbor, (opposite direction as DL so you would have to go over the overpass) which has pretty good food.