Loved Sci-Fi, went twice this past trip, once with just our family, and once with DGrandparents. Both meals were good, and the second experience was made FANTASTIC by an outstanding waitress. Big thumbs up for Sci-Fi.
We had burgers, and the kids had hotdogs and pizza, and the movies totally kept the kids entertained. There isn't a lot of table space in the cars, and talking to the people behind you can be a bit awkward, but we really had a great time.
Good luck deciding, OP!