In my experience it's tolerable if you know how to wrangle Cygwin/X and Samba and treat the Linux guest like a remote machine that just happens to be on a pheno

In my experience it's tolerable if you know how to wrangle Cygwin/X and Samba and treat the Linux guest like a remote machine that just happens to be on a phenomenally fast network. But it definitely does suck by comparison to something like VMWare or Virtualbox with proper integration support.