When my wife and I had our first child, I swore never to use 2 things; 1. Baby pouch (the thing the baby hangs in on front ot back of the parent) and 2. baby leash (harness). I have been a stay at home dad for 6 1/2 years and never found need for one.....UNTIL NOW. We are now parents of 3 (DS7, DS4 and DD2 (almost 2)). I find myself in the summer at zoos, aquariums, libraries, etc. with 3 kids. A stroller is sometimes impratical, like at a zoo (the kid can't see the animals from the stroller) and it's hard to keep 3 kids in line and you can't hold three hands (I only have 2). I never used it with one or two (we held hands and that was it OR ELSE...lol) but now with 3 kids, I have one and will definately use it at WDW. Just my thoughts.