Recently, I went to the Queen Elizabeth Theatre to see comedian, Demetri Martin. Considering the Martin was late for his own show, the theatre staff were a bit chaotic at first, but after a while, they built up their composure and I felt that they made the environment welcoming.
Overall, the venue is superb, and features an amazing sound system, comfortable seating, pleasant staff and clean bathrooms. I honestly don't have a negative thing to say about the venue, because it defied all of my expectations.
Also, since I didn't mention it earlier, the venue is just moments away from BMO Field (home of the Toronto FC), and accessible by streetcar, taxi and GO Train.