I visited the Nashville Zoo on July 15 to see the recently opened Leopard Forest, and thought I'd write up a quick review. Following a pattern of high quality exhibits Nashville has opened recently, I found the new complex to be the new highlight of the zoo.
The exhibits:

The first exhibit is for De brazza's monkeys - I saw a pair on exhibit. Of the four new exhibits, I found this to be the weakest, although still a solid exhibit. My main critique is the lack of verticality and overall size of the exhibit. However, the inclusion of vegetation in the exhibit and the sheer variety of climbing options makes for a engaging environment.

The next exhibit is for amur leopards - the namesake and highlight of the complex. The exhibit is large and well planted with plenty of climbing opportunities, and includes a bridge over the pathway for the leopards to enter and exit the on view habitat. There are three guest viewing options, two behind mesh and one behind glass. I found that the cross viewing behind the mesh view points to be distracting, although I think once the foliage grows in more, that won't be as much of a problem.

The third exhibit is for a group of mantled guereza - I saw four on exhibit. An excellent exhibit with plenty of climbing opportunities and lots of space. There was some vegetation in the exhibit, but not much so hopefully over time more is planted

The fourth and final new exhibit is for klipspringer (and rock hyrax as signed). A worker told me while I was there that they were concerned that both the klipspringer and hyrax would be able to escape, so were looking at options to modify the exhibit before the animals would be viewable. An unfortunate set-back, the exhibit is attractive and includes two viewing options - behind mesh and open-top view.
Other positives:
For much of the walk through the complex, the white rhino exhibit runs alongside on the right, including a very attractive viewing point over a small pond for the rhinos. I found the viewing options much stronger on this side of the exhibit than alongside the path to the animal hospital. The giraffes are now back on exhibit, in an attractive, well planted, yard. I found the theming to be simple but strong, mostly just including some attractive metal animal sculptures.
Negatives:
My only complaint is the on the layout of the new complex. Leopard forest is a dead end trail, requiring guests to walk up and then back along the same path. Combined with the path to the animal hospital and to grassmere, to see the entire zoo requires walking up and back down the same hill three separate times.