Bill
I've stayed in regular SSR villas and a THV. I think the THVs are very cool. So fun. If you are all about the parks and don't want to spend any time at the villa, THV might not be a good choice. It does add a few minutes time to get to the bus stop. But if you want to hang out at the villa a bit, use the grill, enjoy the surroundings - I'd go for a treehouse, especially if you have kids.
The theme is outdoorsy but really cool. I am a self admitted resort snob and I thought they were fantastic! We grilled twice. it was very nice to not have neighbors and have some quiet time after the parks or during the day. We took the boat to DTD and a bus to the Springs.