I love Sci-fi. The food isn't fabulous, but it's better than any fast food restaurant. The atmosphere is quite entertaining. We took my 70yo mom there on her very first trip to WDW. She still talks about how great it was--it was her favorite spot, bar none.
I have had a problem ordering in restaurants at WDW. If we get something we really don't like, they have always tried to make it better, even if it meant "making it up." (My DS once got a whole plate of food he could not chew--the server asked what he could eat and promptly retreived a most eclectic meal from the kitchen which my Ds wolfed down.) Keep your Pss and have a good time.