Mine has arrived. The batterie on both had a roughly 50% charge, and I have vacuumed the sitting room to see how they work.
I was surprised and a bit embarrassed to see how much dust came off the carpet, as it was done on Friday, but in the long run that's a good sign. I haven't done the stairs yet, but I tried out the handheld one around the edges of the coffee table, and picked up more dust there.
My sofas and coffee table are all very heavy and have 'feet' rather than 'legs', so are low, and the Air ram doesn't fit under any of them. I can't say I expected it to, but it would have been good if it had.
The lights on the front might prove to be a useful feature, but I don't usually vacuum in the dark, and I guess they will drain the battery, so maybe they are more for style than substance - although Gwyneth, they might illuminate dark hairs on a dark carpet, or light on light.
So, early days, but so far I'm pleased with it. It would have been useful if the hand held one had come with an accessories bag, though - you can send off for a 'home and car kit' for an extra £25, and I think that this should have been included.