I've had the yoga 13 for over a month now, got in on the last refurb deal, Really liking it. But...upgrading to windows 8 pro requires a workaround.
trackpad has some options that you need to fix, palm protection is way too high at default. (stops you from moving on the tp and clicking keyboard keys at same time.
have a cloth to continually wipe the screen on you
if you heavily rely on the right shift key, you may not like the keyboard (its about half the normal size)
haven't had any wifi issues, but if you do...return it