We came here after being dissuaded from going to the Sloth Sanctuary after hearing lots of bad things (do your research first!) and I'm very glad we went. We were shown around by one of the owners on a private tour and she told us so much about the plants and flowers growing, was absolutely fascinating! The facilities and enclosures for the animals are basic but more than adequate. Me and my boyfriend are both zoo keepers so we understand animal welfare and husbandry and it was clear the staff/volunteers are doing a very good job.
Definitely put this on your list to visit (good for a rainy day too) but definitely go with a guided tour, worth the money tenfold and it all goes to a very good cause!