Not much to say about the place since alot of people raved about it already. Its basically a really beautiful greenhouse with various plants and flowers. Its not really big inside so you can be done in less than 10mins. Its free to come in (not sure about the donation box though unless I missed it) and its a nice place to take pictures, although the sign by the entrance says photoshoots require a permit of course.
I highly recommend you visit this area at least once. Its very pretty especially when its sunny out.