I'm not a big fan of caliper covers, maybe that's just me.
I had mine painted like yours before. Looked good, but I got a great deal on the covers so figured I'd try them. Honestly, you can barely even see them since they're black. I'm not a huge fan of the other colors.
They say it helps with brake dust and cooling but who knows. Think it's mostly an appearance thing. Some people like it over the painted caliper. They come with clips and you screw the cover to the clip which is attached to the caliper. Simple, I didn't even remove my wheels.
I wouldn't worry about the flame suit on this site. There are members here that literally put different all season tires on their Jeeps because they think it makes them look tougher than their friends with Lexus RXs and BMW X3s. No, im not joking, its hilarious.
2014 Grand Cherokee LTD
1997 Grand Cherokee Laredo - Lifted, ARB'd, Mud Terrains, ETC
2007 Nissan 350Z - Volks TAs, coilovers, carbon fiber kitted, yada yada yada