It's fine for casual use and CPU- or network-bound tasks. But anything involving lots of filesystem operations (like, heh, building software) is just a mess. The project I'm working on right now is a biggish C tree using cmake/ninja that still builds in 3-20 seconds (depending on configuration) on my dual core laptop but takes 90+ on a quad core skylake under WSL.
But for the simple case of "I need to ssh around or pull some files with curl or check something out from github or whatever and I don't have my linux box" it works great.