Although I know Kaisen Linux claims to be a distribution targeted at sysadmins, it has a much broader appeal in my opinion.
Anyone working in Linux, in a non monolithic environment would really enjoy the diversity of tools available with the standard install, be it for development or troubleshooting.
I am using the KDE version. I tried the other versions as well but the KDE was the one that worked out of the box with my multi 4K and 2K monitors.
Using BTRFS and having a very cool update script which allows for a rapid reversal to the earlier version in case of failure, this is an excellent rolling release of Debian. I upgrade my system very night before shutting down and have done so since I started using it two months ago and I have had very few issues. None that were not resolved in record time.
More importantly, Kevin Chevreuil, the author, extremely quick support is most refreshing.
In summary I find Kaisen Linux is an excellent BTRFS Debian rolling distribution for sysadmins and developers with exemplary support. It has become the standard distro for my main workstation.
Thanks Kevin,
9+/10* 
PS: I will post a similar review on distrowatch