2 visits in the past two years. It is quite beautiful inside the unique botanical garden focusing on local desert flora. Lots of placards abound to tell you the different names of the cacti, aloe, and agave. There are probably 5 sections to the gardens that take about 5 minutes or each to walk around the walkway loop. One focuses on I believe on hummingbirds so the plants attract a good amount of hummingbirds if you have the patience to watch for them. I thought that for the admission price, what you got what pretty fair. The grounds are immaculate, though perhaps smaller than I expected. Staff are friendly. Since it is an outdoor tourist attraction on essentially the surface of the sun, staff on golf carts run around hydrating tourists who will certainly not be prepared for such oven heat.
The Chihuly addition to the gardens I have mixed feelings. On the one hand, it adds some pizzazz to the grounds. On the other, it looks sort of forced, out of place, and more of a PR stunt to get tourists to come. Especially the glass swans in the small lake....I couldn't get down with that.
Can spend as little as 30min here and as much an 1 hour. Make sure to take a break from the heat at some point. Stay hydrated and bring a water bottle.