I was there last year. It sucked ass. The music was mediocre. They overcharged for drinks and didn't offer food besides some weak hotdogs, but if you left the concert area, you would have to pay again to re-enter.
It started too early and ended too early. And they canceled the after-party amidst some cop-out bullshit rumor that there was drug use. Yeah, there were some foreigners toking up, but they didn't cause any harm.
Unless the dumb cunts in charge looked back at last year as an INTRO to proper event planning, I'd suggest you save your money. You'd be better off bringing your iPod to a club and passing some decent tunes to the DJ.