I think he's pretty dang good. I mean, I'm always in awe at his detailwork in the backgrounds and the way he just fills panels with them. I'll say it again: he draws hands absolutely wonderfully. It's so nice to see a well crafted hand for a change instead of... well, something not.
And then you get the very big changes in faces. Look at scan 2 (skipping the cover). The entire page is practically perfect. Great details, the faces are appropriate and everything flows well.
And then the next panel you get OH MY GOD, LEX WILL EAT ME!!! D:
Granted the exaggeration is probably done to emphasis the kryptonite's "strangeness," but c'mon.