I used many sets of MSD wires over the years without issue. I bought a set of Firecore wires last year and like them too.

I will say, the MSD pre-made wires are not that great of a fit length wise but, the Firecore wires fit nicely. The last two sets of MSD wires I made myself. Nothing wrong with either but, for pre-made, the Firecore wires are definitely better as far as fitment goes.