I just got a ZA5 2-10x40 to go on my daughter's 7mm-08. I have it mounted on the rifle but have not shot it yet. Compared to the Nikon Monarch 3-12x42 I have on my 30-06, it looks clearer and brighter to me.
I had 4 or 5 of them next to zeiss conquests and Nikon monarchs, they are not as sharp or bright as a conquest but they are a little sharper than a monarch, they gather light a little bit better than a monarch too.