I have heard so many complaints about the Dark Sun Encounters: poor balance, poor editing, poor editing that leads to worse balance (calling for a Passive Perception higher than any of the pregens have or else you get hit with a Surprise Round being one example I've heard from multiple sources). Talk about putting your worst foot forward.

I am a total 4E partisan... one of the tags on my WotC community blog is "bards are cheerleaders right?". But I have a feeling Essentials will make it easier for me to cheer.