If you look at blogs about recordings of Wagner's music you find connoisseurs discussing which singer is best on which recording. Each recording has one or two blemishes together with outstanding performers. It is rather a pity that the Sydney Parsifal was not recorded (at least not to my knowledge) as there were no blemishes at all.
Music is so therapeutic. I was still energy-less after a nasty travel gastro when I booked the Tuesday performance (I had already booked Saturday). I thought the music would help recovery and I was right. The Adelaide Ring Cycle had helped me in similar circumstances, resulting in a book.