We went in August and spent 8 nights. We did 5 Disney days, 1 SeaWorld and 2 days Universal/Islands of Adventure. My son was almost 4 at the time. It was expensive but we did enjoy the non-Disney parks.
I was very impressed with the Spiderman Character Breakfast. They had about 6 characters interacting with all the guests and it was very reasonably priced about 1/3 to 1/2 less than the cost of a Disney Character Breakfast. Spiderman spent a lot of time with my son, my 10 year old niece and 13 year old nephew telling them to eat healthy so that they could be strong and help him fight bad guys. My son still talks about it and what he got out of the experience made everything worth it.
I found the rides to be a bit more intense than the Disney rides and done very well. The parks were less crowded than Disney parks. I liked that the parkade was covered so your car was not like an oven. I felt the parks were themed very well and had great rides.
What should probably be your deciding factor is - will you be coming back to Florida and be able to do those parks later or should you just go for it now? I was travelling with my brother and his family and it will probably be their only Florida trip so we decided to see and do everything.
I have 2 trips planned to Disney this year and am thinking that next spring, we will head to Florida but spend a week doing Universal, Islands of Adventure and SeaWorld. I am thinking of adding days, park hopper, water parks and more, and no expiry to our 7 day base ticket that we are using next month so that next Spring, if we want to do a Disney day or Disney waterpark, we can.
For SeaWorld, I bought their 2 year annual pass for $149 because just going to visit 2 times pays for it. I used it this past August, I will be using it this April and plan to use it next Spring so I will have definitely gotten my money's worth out of it.
The parks are definitely worth seeing. We did Islands of Adventure/Universal on our first day in Florida so we had great energy. If we had waited to do them after all the Disney parks, we might have found them more exhausting because it does feel like you do more walking at Universal. My sister-in-law had a pedometer on and we walked 14 miles (22 kms) that day - we averaged about 10 miles (16 kms) at Disney.
