I have just has a short preview of some of the presets. This is very good and will replace QL Spaces I as my go-to convolution reverb. They have added some great sounding spaces. The interface is as clean and straightforward with no fancy processing options and functionally similar to the original but they have added a decay parameter. They have also added photographs of the space, a minor point which I think adds a bit of context.
Versions I and II coexist on the system so there are no worries about existing projects.
I have CC so i did not have to make the upgrade decision, for anyone considering an upgrade the main reason would be the additional spaces.