I have three of the carbon steel skillets. The best is by Mauviel, the other two, very good skillets, are from Lodge.
They heat rapidly, have excellent heat dispersion, with little or no hot spots. They season just like cast iron, and become virtually not stick.
The pans work equally well over a campfire. They are bullet proof. They are light weight.
For me, they don't replace any of my cast iron, but they certainly are nice to use.