I have bought a set of repro bumpers and they are good but not as heavy guage metal as the originals. Probably only noticable when you have both together. The chrome is fine for a top end driver and maybe a lower end concourse but does not have that deep luster of a really good top end (read price) chrome finish.
I chromed my original bumpers and just the chroming was more than the cost of the repro bumpers.
Garry