I got my Z2 yesterday and played with it for a few hours ( I really miss the extra options on my old D3 like changing colors, sharper display etc)
After playing with the Z2 I took the HD out and swapped with a HD with the Z3 upgrade in it.
I still see the maps are out of date, my cousins house was made on 2005 and now shows up with the Z3 upgrade, with the Z2 HD didn't show up, but mine still doesn't show up with the Z3 upgrade, and this condos have been made since 2006. My cousin kenwood HU haves my address and it have been on the market almost 6 months.
The map looks the same for what I can see, I haven't see any 3D structures like the one on the pioneer website . The only difference is some new addresses. the Z3 upgrade didn't change anything on the interface.
Z3 upgrade is basically some updates maps and maybe a 3D buildings (wich I guess if you drive the whole USA you can count them) I haven't seen one yet.
I was very close to buy the new Z3 , thank god I only downloaded the image of the Z3.