It works well with i3, bspwm, dwm, XMonad, Spectrwm and others, but the default one is i3.
I must say that I only tried it live. But it runs fast and it is pretty cool. I have not installed it because I am too lazy to learn ARCH. I tried ARCH once but only for a little while.
Their official website is https://axyl-os.github.io
As a curiosity. It was developed in Republic of the Philippines. But I do not know anything else about it apart from what I read on Wikipedia.