I've just returned from a 5-day trip to Walt Disney World in Orlando, Florida with my husband, son, daughter (7 months pregnant), son-in-law, and 4-year-old granddaughter. I'm happy to say that both TKRs stood up to the test. I averaged walking 8.5 miles per day, and walked 10.5 miles one day. My feet got tired, but I had NO problems with my knees. I did have a little bit of swelling in my left ankle, but it wasn't bothersome. I've been to WDW many times, but it was so much fun to see the magic of Disney through a 4-year-old's eyes. She did the Bibbidi Bobbidi Boutique experience where, in Cinderella's castle, she was transformed into her favorite Disney princess, Princess Anna from Frozen. It was the "most Disney" thing ever - truly magical. I've attached some photos of my family and our princess. That's me in the orange t-shirt.