I bought it last night and only have a few hours in. So far it's pretty great though. I look forward to seeing it continue to develop, and according to reviews posted by pre-release testers the developer is very open to community feedback.
It's definitely not a fully complete game yet, but I expect I'll get at least a couple weekend binges out of it before I shelve it and wait for more content.
Also, it's working perfectly in Linux (through Proton) so extra points there.