I used the Swift FX for a long time, which is the predecessor to Airfit P10. Unfortunately they do not make them any more, and for some reason the P10 feels like it is putting my septum in a vice, it pinches it so hard. I can use a little bit of tape to cushion it, but it is a pain and still not the greatest.

I've ended up going with the N30i which is okay unless I'm a little congested as it kind of pinches my nostrils shut slightly, in which case I use the P30i fitting with the aforementioned tape. I miss the FX.