anyone tried one of these, was thinking of getting one

Yep, I've got a N43 air. Bit noisy in the wind but it's very versatile. My mate who bought one at the same time feels the same. Also, size for size compared to other helmets they feel just a little bit looser. We bought them so that we could have the integrated Nolan bluetooth kit with radio and that part is great. To sum up, not as quiet as a full face but probably better than most modular ones. Quite light I did consider the Shark one but that's very heavy compared to the Nolan. Overall I'm more satisfied with it when on my Burgman behind a large Givi screen, but its a bit noisier on my SH.