I just upgraded my virtual machine to Unity. All the negatives I'd read rang true. The interface really does seem like a poor copy of OS X, for tablets. Complaints are often dismissed with a curt suggestion to switch distributions. However, there is an inescapable truth:
If the #2 Google suggestion is "your product sucks", you can take it as strong evidence that you've made a poor product development decision.
Personally, I'm rolling my virtual machine back to a prior snapshot.