Dr. Walderman is extremely efficient: she had me in/out of her office in less than 10 minutes. I would definitely return to see her. Wait on a Sunday around 10:30am is approx. 30 minutes (but I think I really only waited 15-20 minutes). Receptionist was not unfriendly.
Also, conveniently, there's a Shopper's Drug Mart just east of Strachan on King so, you can fill prescriptions quickly after.