Our 1st stay at OKW was in a ground floor studio. The musty smell was terrible! Not to mention that there were air conditioners right next to our patio. We said never again! (However, we did like the pool in the Turtle Pond area.....the water was nice & warm!) But a few yrs later, we decided to book a 2 bdrm for the 1st 2 nights of our trip, & requested that it not be on the ground fl. We checked in late one evening, and were very unhappy to find out they had booked us in to a ground floor unit. Luckily, it wasn't a busy time of the year, and they were able to change our room. We loved it this time. No musty smell at all.
OKW has huge rooms, including the laundry area. They offer a peaceful & pretty view from the balconies. The boat service to DTD was very valuable. And you have Olivia's with great food. As someone else suggested, take a look at Josh's review on easywdw. He describes it wonderfully, and includes lots & lots of pictures.