I'm enjoying the X stuff, but I'd say the Classic stories are where the book really shines.
Been pretty consistent across the length of the comic, I'd say. I've been a fond of Ian Flynn's writing ever since the 170's or so of the Sonic The Hedgehog comics (though I'm not happy with Sonic's post-crossover-reboot, that's largely believed to be more due to Penders and Sega than to Flynn).
Mainly Penders and Penders, with a side of Archie. The deal with SEGA way back when the book was starting was that SEGA would own e v e r y t h i n g. All creators were meant to sign contracts stating they gave the rights to their creations to SEGA. Either Archie just plain forgot to get him to sign, or (more likely) his contract was lost years ago. A former Archie staffer let slip in court documents that apparently they lost a lot of contracts from their warehouse in the 90s. The settlement with Archie was apparently them refusing to acknowledge he owns anything, but agreeing not to sue him for use of the characters he says he came up with. They couldn't say he owned anything without angering SEGA, who Ken was trying to sue. And he'd still like to, but after the settlement was agreed on it turned out that he'd botched the lawsuit against SEGA and his chance to sue over Sonic Chronicles expired. So now he's saying he'd be happy licensing if Archie agreed to a bunch of looney conditions, but Archie can't license because they refuse to admit he owns anything, and besides SEGA wouldn't want money going to a man actively looking for ways to sue them.
So in the end the only winners in this mess were the lawyers.