The stainless steel frames are incredibly strong, and I have never experienced chipping or fading of colors even on those I owned for three years.
5g works great. I was only getting 20-30 on LTE and getting 100-200 on the 5g in my area.
Also 5g speeds on a 5g phone are only as good as the server providing the 5g. Verizon does the highest end 5g speeds while Sprint, T-Mobile and AT&T are low to mid range 5g speeds.
But even with low to mid range server I am getting 5-10 times faster speed on my 5g Iphone than LTE.