I also liked the Airis - at the boatshow - have never seen (or tried) one on the water. Nor ever met anyone with one. That worried me. Maybe I just meet the wrong people.
I've moved on to the Hobie inflatable kayak. Haven't bought (or even been on the water) but have talked to live owners. Universal, unqualified praise - especially for the penguin flipper drive thingy. Good in rough water. Tracks well. Fast. One very experienced paddler told me that he doubted I'd go back to a paddle after using the drive.
You can also mount a sail and the same paddler told me that the sail worked much better than he expected (he had expected it to be terrible). The flipper things get pointed straight down and act like a centerboard. Or you can peddle and sail at the same time.
The only thing people don't like is that it's quite pricey.
Carl