Wow.
I will start by saying that I came into this comic expecting the same as everybody else. "Why Vibe" "Why Now"? After reading this issue, wow. I am thinking "Why not sooner?"
The Good: Okay this issue was a very good introduction on Vibe. As the use above me said, it's best to read JLA first, because it gives a better background to where/who this kid is. His powers amazed me, I had no idea he could do some of the stuff he does. And overall he is a solid character. It developed a good basis on why he'd want to join the JLA and it also left you hanging with the final page.
The Bad: I only had very minor issues with this issue. I didn't like the fact that he has no idea what he can do, FIVE YEARS AFTER his accident. That was odd. And also the page where is shows him in uniform head on was a little weird on the art side. But those ere really the only thing I had a problem with.
The Verdict: Very solid start for an underdog character. And I will love to see where this is going.
Overall: I'd give this issue a 4.5/5. I would definitely say this is a must read (unlike Katana.)
Favorite Page: THE COVER!