Nice looking-we also switched to chrome when we changed wheels.
We also got cracking on our last trip, and by the time we got home all 4 covers were rattling like crazy because they had come loose. I think it may be related to the very hot brakes we go in the mountains.
I like yours because they have 8 feet to contact the wheel, ours only have 4, so the flex a lot, probably making it worse. I wonder if ones like yours would fit ours. I have been experimenting with springs and rubber to replace the feet with something more compliant, but not gotten very far.
We also got chrome nut covers for ours, which also look really nice, from ebay.