Our ressie was for 8pm, but we weren't seated until about 8:30. Our meals came during the fireworks, so we nibbled as we watched.
I got an English Rose to drink (very good, and they gave it to me in a glow mug as a honeymoon gift). I also got a salad with mustard vinagrette dressing. Also very good, but had too much dressing, so I'd ask for it on the side next time. Both Mark and I got the fish and chips which were great and very filling. We couldn't even save room for dessert!!
Since we didn't get seated until 8:30 we didn't finish our food until long after Illuminations ended. They didn't rush us at all though, just let us eat at a leisurely pace. It was really nice being able to leave Epcot without all the hoards of people.