Saw him playing live 2 days ago. It was fantastic! I met him in Poznań, he was standing in the corner and talking with Justin Meldal-Johnsen, just like that. I got their signs on the ticket, they were very kind and nice. I regret i didn't say much, i was really stunned. I admit i didn't hear his cooperation with Guns N'Roses, but his work in Nine Inch Nails is totally awesome. He is incredible. One of my favourite guitarists, wish to see him live again!