It's a nice theme. But with a side menu like that, it would be better to keep less items on the forum menu to make navigating to what you want easier. The sound notification is terrible. Maybe a darker background to prevent too much eye strain.
As long as your windows is up to date, it should run without much issue. Runs on 1809 and 1903 as far as I'm aware. Once you purchase, it will tell you other things that may need to be disabled. I think the major thing to disable is Windows Defender and Smartscreen. Might as well disable UAC as well so it all runs without much issue.