You will get opinions all over the place so I suggest looking at the menu for each place that you are interested in and go from there.
In DHS we've eaten at 50's, Sci-Fi & Mama. We usually do both Sci-Fi and Mama at least once each trip but if I could only pick one I'd go with Mama. We have always had great service there and the food has always been wonderful. I leave Mamas feeling full and happy. With Sci-Fi I leave feeling happy, not so full but we also only will do lunch there. And with 50s I leave asking myself why we just spent that much money on our less than good meal and I'm looking for a snack.
At Mamas DH & I both usually get the chicken parm and it is yummy!! The chicken isn't beaten to the width of a piece of cardboard, it is tender and juicy and the amount you get is very filling. The kids (5 & 9) tend to split a kid's spaghetti because it is a pretty generous helping.
At Sci-Fi DH usually gets the burger (he says it is the second best burger on property, second only to Le Cellier), I get the grilled chicken sandwich which is pretty darn tasty and the kids get either hot dogs or burgers.
The last time at 50s Dh's pot roast was mostly fat, my meatloaf was a small single slab of semi-dry meatloaf with a small ice cream scoop of mashed potatoes and some green beans. At the end of the meal they messed up our desserts and brought out the wrong items to half of us.

We tried this place three times before completely giving up and swearing it off.