Most people think CS serrations are single use, and once broken or dulled they believe they have basically a throwaway blade.
But,, even though CS serrations are much finer and have a more fragile construction than Spyderco's they bite deeper into soft targets (i.e. flesh, meat) and rip more agressively.
Now, don't use them on anything harder or a bit tougher, as they'll break, snap and split with ease, leaving you an ugly, irregular pattern.
They are harder to sharpen, but it is not impossible, and Lansky designed a specific sharpener, very similar to the Croc Stick sharpeners for Spyderco, that fits the CS pattern and matches exactly the valleys and peaks.
Both finer and larger scallops can be sharpened simultaneously this way.
Larger scallops can be sharpened alone, though, with a tapered rod (like DMT's) and cut effectively for a long while.
Anyways, it's just a matter of patience and having the right tool for the job