My personal experience is with CTS-XHP.
I have a 3" prototype Bark River fixed blade and a 7" Northwoods Santoku.
I have been using the 3" Bark River knife for several years as an EDC/Job-site knife, and it has seen some very rough duty.
The Northwoods has seen kitchen duty most every day for quite a few months now.
Experience with one has been confirmed by experience with the other.
I find XHP to be an exceptional stainless steel, it easily takes a razor sharp edge (easier then most steels in this class).
It does loose it's initial razor sharpness a little quicker then S30V or S35VN, but settles into a working sharpness that seems to last forever; I have had trouble getting either blade dull enough to not cut reasonably well.
In the Kitchen the Santoku devourers fruits and vegetables like there is no tomorrow, and a few passes on a strop always brings it back to the level of sharpness needed to cleanly slice soft skinned, ultra-ripe tomatoes or stone fruits.
On the Job-site I have used the Bark River for many nasty chores like scraping tar and epoxy paint from steel and concrete to help determine the thickness and bonding power of the coating systems.
Even with this level of abuse the Carpenter steel was always easy to bring back to it's initial sharpness.
I have been very impressed with CTS-XHP, and look forward to trying some of the CTS-204P.
Big Mike