Just got back after a 10 day trip to WDW with my Schwinn double jogger. I loved it there. I am so thankful I took it. It is a bit more awkward than the single I took last time, but overall, much better.
I have a 4yo who is about the average size of a 6 or 7 yo and a 15 month baby who is quite small for his age. Not many strollers will accomadate both. My jogger does. It also turns on a dime and is so convienent in so many ways. It is the world's easiest stroller to push, even with two kids in it and 6 months pregnant. Plus, when we came back at night or were in DTD and both kids were sleeping, there was no better arguement for bringing your own stroller. Many others stated how envious they were of me at that moment.
It could be rolled straight on to the monorail in the handicap cars. The CMs went out of their way to let me on when they saw me, even re-opening a car that had been closed waving me up forward. The ferry wasn't an issue either. We had boat service to other resorts and to MK (stayed at WL) and the jogger pretty much just rolled onto those boats also. Great for not waking sleeping children. A couple of the smaller boats, it did need to be folded. The CM usually grabbed it from me and put it up front and unloaded it for me also--even without anyone else on the boat.
We only took the bus one day (had an early PS/ADR at Donald's breakfast and couldn't drive--won't let you in the parking lot). The bus driver in the morning made me carry it through the front door folded, around people, and I was so scared I'd hit someone. Thankfully I didn't. My DH considered going back alone and getting the car, but we decided to just take the bus back. The bus driver here, saw the stroller, told me to wait by handicap entrance and opened those doors; it was folded, but I probably didn't need to fold it--bus wasn't overly crowded.
When folding the stroller, I found it was pertinent to lock the front wheel vs. leaving it on swivel for an easier push. That was the only trick. The wheel is under the foot stand, so no need to remove it.
Getting into the parks with the stroller was also easy at every park but MK. At MK you needed every centimeter of space available and still had to angle it just right. The other parks no special going in or outs needed and you had room to spare. A little bit of a hassle here, but all the other times that it was so exteremely convienent made it worth it.
Hope this helps. Any other questions, just ask