I just received a new ZA5 HD 3-15x50 about a week ago. The glass is very clear with good resolution and clarity out to the edges. Not much pincushion that I could tell. I did notice very slight CA at the edges when viewing a very dark object against a much lighter background. It was a black shutter against an off white house at about 75yds. However, try as I might, I didn't notice any CA looking at any other objects in bright or low light.
The turrets aren't as "mechanical" as I would like. They're a bit soft. However, once zeroed, I won't be dialing in windage or elevation.
With regards to my thoughts above... Please keep in mind I'm just a novice at all this, but I do like the scope. Much more experienced people may have different thoughts though.