I have just watched this (had recorded it) and thoroughly enjoyed it. What a wonderful mix of musicians and styles - there was quite clearly great rapport between the musicians. Kathryn and Peter obviously impressed the others they were working with who seemed to be quite bowled over by the vitality of their playing. It was also interesting to see how the project developed. I personally don't have any issues with either Sting's voice or attitude - I found the bits between the music interesting.
Have saved the recording to show to my pupils - I teach music in a secondary school. A great example of mixing styles and genres successfully.