Pei was very easy to work with and responsive to all requests. Any emails were always quickly answered. We had a group of people where not everyone was interested in singing, but Pei and his wife successfully encouraged a variety of people to sing. My guess is that he is working with old equipment. For example, though we requested a particular song in advance to start the show, it took several minutes for him to set it up. I would be more encouraged to work with Pei again if he had newer equipment. Thank you for being a pleasure to work with, Pei.