The differences between tiers - Unlimited is better quality, has an offline mode, and allows full cell phone access. And you need to sign up for an invite to access the free version - which I've done, so we'll see.
Damn, it's like GNR never left us. Are you sure it's not 1992 again? And why the hell was Axl not even in town until the day of the show, but the rest of the band was? Something doesn't jive there. I'm holding tickets for GNR in Boston next month.