Saw them last night at Gillette Stadium. I have to say they put on one helluva show. I've always liked them but never considered myself a huge fan of their music, but their live performance ranks up there with the best I've ever seen. And it's a good thing I'm typing this not saying it because I don't have much of a voice today.
I had a friend from work who went there last night. He wasn't a big fan and didn't expect much. He said it was one of the best concerts he had ever been to.
They've always put on a good live show as far as I can tell. If You Want Blood, their live album with Bon Scott, is IMO the best thing they've ever put out.