It works very well, it's partly about microsoft ditching a lot of dependency on windows and giving open source developers what they have had for a while with ruby/python/java (think gem packages, ability to run build tasks etc easily via a command line interface) etc.
I recently converted an asp.net web app to dotnet core and was able to run it via nginx to the in built kestrel web server the only problem I had was connecting to an MS SQL server named instance.
