We just ate at Sci-Fi last week. DH and I agree that it was our WORST meal. I thought it would be cool for us and the kids (and grandparents) to eat in a car. The food was just okay - nothing special. We knew from reading reviews that we weren't going for the food - just the atmosphere. However, DH and I felt that we entered the Twilight Zone - it was the QUIETEST restaurant we've EVER been in. It was packed, but you could literally hear a pin drop! I felt that I had to "shush" my kids (a 6 & 4 yr old) the entire time because I didn't want to ruin anyone else's viewing of the movie clips - which did not hold my kids attention at all. Also, it was difficult to have a conversation in the car since there are 2 per seat and there were 6 of us. Also, our server seemed to forget about us once he had delievered the meals to our table. It took forever to get dessert and the check.
I'm not sure if anyone else has had a similiar experience, this was just ours. I know other families love the place, it just wasn't for us. Since the OP has young kids, if they are a little "active" like my 4yr old, it may not be the place for them. We won't be going back to Sci-Fi. Cool concept, but we didn't like the quiet atmosphere. Just my 2 cents worth.