i went for the 2007 perforamnce and I must say the sound at the venue is extremely bad. I don't know what factors were involved though... was it the sound crew bad mixing job? was it the venue acoustics or lack of? don't know.
all i know was the drums volume was too loud and so is the bass - can be sound crew mixing or the resonance at the venue.
I remember herman li on stage pointing to the sound crew to lower the drums and the bass volumes coz he can't even hear his own guitar part, but the soudn didn't improve.
i hope this time round there's an improvement in the sound mix.