Our first trip to WDW was in 2005. We were clueless and went without ADRs. My aunt had helped me plan the trip, but they must have just eaten at QS because nothing was ever mentioned about ADRs. Anyway, once there our first day was at DHS and it was there I discovered TS restaurants. I don't remember if I looked up info online or if there was a picture of Sc-Fi in the times guide, but I do remember wanting to eat there so bad. We tried to do a walk-up but nothing. We ended up being able to walk up to 50s PT and had a good meal there, but I kept thinking about Sci-Fi. So when we went back in 2008, I was so happy to get an ADR. I was so excited about it! Well, it was one of the biggest let-downs of any TS at Disney. It felt claustrophobic in there. It seemed like we were crammed into the cars. It was so dark we could barely see our food. We couldn't talk since we were all facing the same direction. The movie clips got very old after seeing them over and over and over. The food was nothing special. Needless to say, we haven't been back. Moral of the story: maybe you really aren't missing much!