I went there in November and part of the garden was inaccessible due to the conditions (it rained often). Nevertheless, I saw a part of it and it was a very nice stroll in the nature. There are interesting butterflies which I've never seen before. Make sure to bring a mosquito spray!
I think it's the nicest waterfall in Dalat area. Stairs of rock make the water flow in a beautiful manner. Better go there when it's dry, with the rain the path is really slippery.
Really good day ! Children were very impressed with the place. Space for picnic shop with icecream and basic food + playground were adding to the attraction for us. I would recommend it!