My Aeron came in. It's basically my first office chair I've used at home in about 6 years, and it feels great. I actually love the forward leaning sitting position, it makes me feel more active. I will say I am pretty long at 194cm, and that even with size C I feel I'm right at the limit of how long you can be for the chair. That might just be me though, but if you're 200cm or longer, you might just go for another model.
Also I can totally get people not liking the plastic edge, I don't think the chair looks expensive, even with the polished aluminum I have. I don't feel the plastic while sitting at all though, so it's more of a appearance issue. Also ordered a headrest, but it seems like the chair makes you sit in a position where you don't need one, so I think I'll send it back.