Bought one of these the other day when my Shoei GT Air had to go back for a warranty claim. No idea how long they'll have it so I thought a spare lid wouldn't be a bad idea. Had a ride out with it for the first time today and for the money I'm very impressed. I paid too much - £149 at Infinity. They're going for £120 elsewhere but all the same its a good lid. Slightly draftier but I can't honestly say any noisier than the Shoei, very comfortable, pin-lock visor, sun visor and vents that work. The bottom vent has to be operated from inside which is tricky on the move but a minor detail. The only flaw really is the sharp, curved profile of the base means it rolls around easily when put down. All in all, for a back-up or emergency helmet seems like damn good value for money.
I've got one, and bought it slightly on a whim because it was cheap... Really like it and it's my go-to lid now. Just remember to peel the protection off the sunvisor before using!