looks like a nice unit, 12" seems about the right size. Alot of wiring with the GPS puck and multiple cameras. Amazon has a better price then their website. Keep us updated on its quality.
I like the old large screen Lowrance units found on ebay. I have bought a few of them and they are great for a basic GPS. You can load custom routes onto smaller SD cards and view them also. I use one along with my Polaris ride command and Onyx on my phone for backup.