The two seasons sat on my shelf for ages but once I started watching them, I went through both boxes very quickly.
I have the R2 versions which are 16:9 anamorphic. I do not know what the creator's intended aspect ratio for the show is, but I have seen the 4:3 version as well and both versions seem to work just as well to me. Given the camerawork is largely handheld (I think) and constantly moving, I never felt like there was dead space around the actors, such as in Buffy 16:9 for example.