Yeah, I'd say my chair is pretty comfortable, it's a few years old, I got it from Staples for half price.
It rocks back pretty well, and spins, but my desk gets in the way of the spinning, and there's a bunch of stuff behind me, so I can only lean back to an extent, but I can lean enough, ditto with the spinning.
It gets blocked from moving too much by the paper and stuff scattered on the floor though, but it can move enough. The height is good, it's at just less than full height and my monitor is angled up at my face, which is the correct body position or something.
All in all, yeah, I like it.
Wow, I just reviewed my chair.
How sad.
[sub]Anyway, off to work[/sub]