the early chapters may have some crude drawings but the creator, Tom Siddell, goes from adequate to put across his ideas to simply good by any standards.
Gunnerkrigg Court just has the capacity to have even the most cynical reader put aside the cynical and critical faculties, in part because of sheer charm of it and the world that he creates but largely because Tom Siddell has such an uncanny knack for storytelling that he avoids all the flaws and pitfalls that would trip up a less accomplished creator.
I'm quite a fan of Gunnerkrigg and I second Ria13's comments. The first couple of chapters are fairly simple, but the quality quickly increases and it is now a very well written, well drawn and thoroughly engaging comic.
Gunnerkrigg is great, particularly the stand-alone stories such as the bird-boy one and the flashback with the robot guy in little video-view, all spoiling the kids' innocence.
Also it is the funniest comic on the web actually, when you read Tom's helpful comments at the bottom of each page like "It's Coyote. That green guy is Coyote in disguise (and that big guy is Eglamore)." and "Eglamore looks pretty different. (This was a joke, that is not Mr. Eglamore)"
I dunno if I'd call the robot flashback thing a standalone. It's a major exposition piece that helps connect virtually everything (including Zimmy even, but not the TicTocs) to the big ominous secret wotsit that's at the centre of the story.
That being said though, the robot king's face is totally a stand-alone dramatic moment which few if any comics will ever be able to manage, and it needs no context. It is totally a sad face :(