I just spent more than an hour trying to get some basic usable design for the backend, but totally failed. All of the presets are terrible, and editing is very limited. You cannot select a preset and change it a little, the "custom" edited preset has its own start design, which is also terrible. Especially in dark mode, some text becomes unreadable. There is a dark/light mode switch top right, very nice, but the setting is overwritten by default on each page load, making this useless. There is a huge WP Adminify logo top left in the admin bar, I found no way to change it. The admin bar has a new item "false". The main WP menu on the left gets random lines in between some of the items.
Altogether, this is a nice idea, badly executed, or in early beta. I don't know. But in this state, I cannot use it, and I don't want to open a support ticket for each of the many issues. And this being at version 4 already, I have little hope all this is going to be fixed soon.