The wifi is neither great nor awful. My Pi3 is not more than 30 feet from the wireless AP (an Apple 802.11ac AirPort Extreme), but if I were to draw a straight line it does go through a lot of old wood flooring and siding. The signal quality (iwconfig) in linux generally lists a quality of around 29/70. Since putting it on the independent power supply it seems to stay connected consistently and work well.
That 60 VA supply seems to work well.