The rap on Nusa Dua is that it's manicured, sanitized, etc., a bit like a corporate campus (with a beach). This ropes it off from most of the hawkers as seen in Kuta or Sanur (but especially Kuta), and in many respects the place could as well be on Maui or Guam. OTOH, it's still nice in its own right and not that far from Kuta or Sanur, anyway.