Well, someone has to start it...
I really liked issue 1. For one thing, I wasn't in the dark after missing the Free Comic Book Day issue (I thought they'd have reprinted that by now!). For another, I liked that while it's Green Lantern-centric, for now, at least, it doesn't require me to know the ins and outs of all the different Corps, because I just don't. I quite reading GL when the Sinestro Corps War started, and planned to but the trade paperbacks by now, but haven't yet. (Heck, vol2 just came out, didn't it?)
So as someone who *knows* the DCU, but isn't exactly in tune with some recent events, I had no problem understanding it. Bitey Guardians? I'm down with that.
My favorite scene has got to be the one in which Hal shows Barry all the heroes who've died in the time between him dying and coming back. I *loved* his reaction to Ronnie -- being the junior member of the league when he was on it, Ronnie was probably the closest person to Wally's age he fought with. He's a kid they took under their wing, and now he's gone. And then seeing Ralph and Sue... but of course, that's setting up a later scene down the line.
The one thing that bugged me was the crypt of dead supervillains the JLA has under their HQ. I don't care if it makes them easier to guard, it's just ghoulish and wrong. Why the hell would anyone want the Fiddler's body? Just guard his &%#@ fiddle, for Pete's sake!