We didn't stay overnight, but visited specifically to zipline. Their staff was friendly but some equipment decisions seem odd: the zipline harness is designed for tree climbing. There was no passive braking system, so zipliners must rely on leather gloves to stop at each small platform. Extension ladders bungee-corded to tree trunks provided the only access to some levels. One person in our party broke her foot when it struck a platform with the attendant watching. (She had previously zip-lined in Mexico, Hawaii, and British Columbia without incident.) Definitely not recommended.
If you own or manage Out'n'About Treehouse, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.