We just got back yesterday. My 16 month old loved WDW. SHe loved seeing the characters--especially Mickey and the Pooh and friends, and she loved every ride she went on. . .which was everything without a height restriction.
She never cries, though. . . she's the happiest baby, gratefully!
The only time she got fussy was during Cirque du Soleil. . . so, my husband stood with her near the doors and rocked her for a while. . .but, other than that, she enjoys shows and is interested in everything.
Since all the parks closed fairly early, we had her nap in the stroller and did baby swaps when necessary.
We also had a hard time pulling her out of the fountains and misters. . . she really enjoyed those, too.
Only thing I would change would be her diet for the week. Being off schedule caused her to be very picky about food. She would eat a fairly good breakfast--but less than when we're home--and a very good dinner, but she wouldn't eat lunch at all. Not a bit, although she snacked on some crackers. But, she did drink, so dehydration wasn't a concern.