To me windows 8 is just windows 7, stabler since they removed the problems from XP now! And with a pretty start menu, so I really don't see the problem with upgrading infact I recommend it. No compatability issues that I have encountered, and no bugs. My only gripe is that the Top Left hand corner shortcut bugs me as when you are trying to click on File in progams it switches you to the previous full screen app.
But I can live with that, overall I would say that it is an improvement and that you should try it. However it can take some getting used to, give it a few weeks (like the SubTract suggested).
-Pow3rCut