I'm not really a huge GnR or Slash fan, but I was at the local fest near my work, and he was playing. Myles really does GnR songs better than Axl does, IMO.
They also did some Velvet Revolver, Slash solo stuff, as well as a Zeppelin tune. Pretty cool.
The sound was awesome; whatever signature head he's playing through is beastly. I was there for some sound check, and Slash's Marshall as well as the other guy's Wizards sounded really, really good.
The biggest surprise was the bassist, who not only rips, but sang lead on Welcome to the Jungle, and just killed it. Really great vocals.
Nice! Always liked Kennedy's vocals with Alter Bridge