I'm debating doing the same thing. Now that I see it, adding the chrome grille probably adds too much chrome for my taste. The vast amount of chrome on the Summit is the reason why I opted for the Overland instead. Thanks for the pictures!
Current: 2015 Jeep Grand Cherokee Summit 4x4 -- Granite/Dark Sienna, 5.7L HEMI V8, Platinum Series Group, Skid Plate Group
Past: 2014 Jeep Grand Cherokee Overland 4x4 -- Granite/Beige, 5.7L HEMI V8, Quadra-Drive II, Advanced Technology Group