I'd say close to just works. I've spent the last 6 months developing with Rider on Arch and it hasn't been a completely smooth ride. Admittedly, a lot of my pain just came from inexperience. I screwed up permissions; it took me ages to setup the right .net packages due to the nomenclature (which, when I installed Visual Studio on Windows, is easily glossed over); function apps took a while to get working.

But it really is satisfying once you've got everything working.