Since a few months I have switched from openhab 2.5x to 3.xx.
the flexibility and the way in which it (Main-UI) is integrated in openhab suits very well. I still have a lot to learn and experiment with openhab 3, but if you are new to openhab you will have the same learning curve with habpanel.
Personally, I find it a disadvantage that Habpanel stores its panels (dashboards) in the browser cache. I know you can also store one copy on the openhab server.
Maybe it as become a bit more user-friendly since I last used habpanel.
And I have already seen some fantastic widgets made in main-ui, that I wonder if this can ever be made with habpanel
Don’t get me wrong Habpanel is a great tool but at the moment I prefer Main-ui