So, my parents recently went to Orlando and did a week long stay at Universal and only did the parks there (plus relaxing in the hotel, shopping, etc.) and did not go to Disney. Now, there are long time Disney lovers who own in the DVC. They did this trip because they got a discounted group room rate at Portofino Bay and just wanted to do a relaxing vacation (they tend to be relatively commando at Disney) and wanted to check out Universal since they have not been for maybe 8 years or so.
Anyway, brief background: parents love Disney, have been going every 1-2 years recently (since joining DVC) and probably every 3-4 years in the 80's and 90's. Dad hates thrills rides (Soarin' and Star Tours is about the limit of what he enjoys, doesn't do BTM, Splash, E:E, Space, etc.). Both loved old school Epcot and hate the changes to that park. So, when they came back, I sat them down and asked them what they thought about Universal, curious as to their experience. Since they were there a week and were not going to do anything else, they bought annual passes and went every day into one or both parks.
General impressions are this:
1. Enjoyed Portofino Bay quite a bit, thought it was very nice. Weren't "wowed" by it to the extent that they wanted to return to stay there again.
2. Thought the service at the Universal resort was quite good "almost as good as Disney". Did not have any bad encounters.
3a. Was disappointed by the counter service food selection in the parks. Felt the food was hit or miss, but mostly uninspiring and generally felt that it was boring/generic. They did think that Three Broomsticks was great.
3b. Liked the sit down places (ate at Mythos, Finnegans, Lombards) and thought they were good but not great. They had eaten at Mythos before and thought it was better previously.
4. Did not care for City Walk, felt it was too "party atmosphere" and thought a lot of younger (high school & college aged) people were there hanging out. My mom would have liked more shopping there (they did make a trip to Premium Outlets on this trip as well).
5. They felt the crowds were very similar to Disney except fewer strollers/young children (though they were still there).
Parks:
1. Both loved Spider Man and went on it repeatedly. They thought Transformers was okay, but not as good. Other particular favorites for both were Despicable Me, MiB and Simpsons.
2. Mom really enjoyed Forbidden Journey. Dad at first thought it was too scary and had his eyes closed the whole time. Second ride, he had them opened, but wasn't that impressed. He thought it was "like Soarin' except you moved". Dad thought the queue was better than the ride
3. They didn't ride any higher thrill rides (Hulk, Dragon Challenge, Rip Ride Rocket, Doctor Doom, etc.). Not either one of their thing. Mom road some like Hippogriff, Mummy, Ripsaw Falls that my dad would not do. Dad felt that SM/Transformers was the limit of "thrill" that he could handle and still enjoy the ride.
4. They felt both parks didn't have enough to do. Part of this is because they used early entry and the front of the line passes, so they burned through rides quickly. My dad, since he avoided most every thrill ride, couldn't/wouldn't do many and felt the parks really weren't worth the money. They both wished there were more sedate experiences like Disney (they love POTC, HM, Spaceship Earth, etc.) -- and that the ones they had were too "kiddy" (e.g. Suess). They also wished there was more shows (like Shrek, which they thought was okay, but not great) or Poseiden's Fury (which they both really liked).
5a. They were surprised that there was no bigtime show or parade in IOA. They expected some sort of fireworks/laser show/etc.
5b. They were not that impressed by either the parade or Cinematic Spectacular at Studios. Felt the parades/shows at Disney are much better.
6. They said there were too many water rides at IoA. My mom, who rode them all, doesn't like to get soaked on water rides but doesn't getting a little wet. Felt it was too much. Water rides are not my dad's thing.
7. They thought the theming for Harry Potter particularly stood out.
They went every day, but said it was more to "get their money's worth". They didn't feel they needed more than 1.5 days at each park. They took long breaks midday at the hotel/pool.
Overall, they liked Universal, but weren't wowed by it. They wouldn't mind going back as part of their trips to Florida since there was stuff they liked, but don't know if they would rent a car to do so, since they usually just go to Disney and stay on property and use internal transport. They plan to go back next year to use the annual passes again while they go to Disney, but don't know if they would go again in the future to Universal.