I went to see it at an expo. It's super lightweight and REALLY compact, but a wee bit simple. I mostly mind the missing lay flat - BUT given the size and use, it is absolutely ok. The zipper+strap recline is a bit fiddly, though. My other reproach is the canopy - I would expect a bit more from a pushchair of this price (around £400 ~ €450). What I truly love, however, is the optional long leg rest - even longer feet don't dangle at all. I am not sure, though, if it really is included with every color, or if it isn't an optional thing.
Also, quality seems quite high - I don't think this is gonna be a buggy for "one summer". The travel bag seems very simple, but it is nice to be included. Overall, the Aer combines quite simple solutions in multiple parts with their signature luxury finishes (makes a strange contrast in a way) - but it is because it doesn't want to compromise on the weight nor the style or quality. Oh and that suspension... very nice :-)