From where I was (towards the front of the GC), it sounded mostly OK, although occasionally the guitar was drowned out somewhat .... at the beginning of Lost Highway for example, I couldn't actually tell what they were playing until Jon started singing, cos I couldn't hear the lead guitar at all. I suppose it's partly going to depend where you are .... perhaps it sound fine from where the mixing desk is? Otherwise, I agree that they should have no problem changing the levels a little bit during the show