This looks neat. My partner was just wishing for the os9 interface but more than a theme on Linux, so if it's been properly tested as a daily driver she may well get some use out of it on her laptop. We'll see!
I've been using it on a 2013 and 2009 macbook pros and its surprisingly fast on all of them. Its built on Debian Linux with a mac os like finder shell called the sniffer that hides all the unix and replaces it with a more familier feel.