Well, ordering the grill was a huge pain in the ass and it took months to arrive, but I finally got the chrome grill from the Summit installed on my Overland. I'm still trying to get used to it. Not sure if I love it yet. I figured I'd post some photos up so everyone else can see what it looks like. Total price was about $250 installed.
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!
2014 Jeep Grand Cherokee Overland- Granite/Beige, 5.7L HEMI V8, Quadra-Drive II, Advanced Technology Group