I'd also add that we have rented homes in other places, too, not just at Disney World. We rented a wonderful chalet in Stowe, VT one summer. We rented a condo in Richmond, VA a couple of years ago. And a few others, too. I've also helped friends rent places including a gorgeous condo in Waikiki where one of my coworkers spent her honeymoon. And just last weekend, my cousin rented a house in Ocean City, MD because the hotels had all hiked their prices and there were 10 of them going. It worked out way cheaper, and far nicer, for them to share a house than to get 5 hotel rooms.
I think renting homes is one of those things that seems sketchy but once you've tried it, you will likely never want to go back to staying in a plain hotel room.