I very much disagree with the criticism in the previous three posts. I thought the sound mix was very good last night. There were a couple instances of feedback, but that had more to do with the sheer number of live mics and monitors on the stage than anything else and is virtually unavoidable. It's not at all fair to blame Sia for that. For the record, I thought Sia was more funny than annoying. I'd probably kill her if I had to tour with her though. She's clearly a loon, but she can sing. My only complaint about her vocals is that I wish she would enunciate more. Anyway, I enjoyed all aspects of the Zero 7 performance, the songs with Sia on vocals, the songs with Jose Gonzalez on vocals, and the instrumentals. Two of the four or five instrumentals were especially fabulous.