Had it a few days now and done two rides. Overall a good bit of kit, looks good and a bargain at £54 (2012 model).
Build – Its basically a dirt jump style hardshell with a detachable chin guard. There are 4 allen bolts so its quick and easy to take the chin on or off. Comes with a spare set of liners.
Venting – Wore it up a 750m climb today (20 degrees and sunny) and it wasnt too bad, chin guard off. From May no doubt it will be off for the climbs (but then so is an XC lid). The visor scoops air into the two front vents which you can feel when you pick up speed.
Protection – Because it fits round your head like a regular full face (when the chin is attached) it stays put and cant slide off or around your head. Being a hard shell (ABS) it shouldn’t crack open in a bad stack. With the chin off there is still more protection round the back than a regular XC helmut.
Worth mentioning that the chin guard has a fair amount of flex to it. Good in one sense in that it will absorb shock but bad in a sense that its possible if you take it beyond its limits you could flex it all the way back to your face (only really in a massive neck breaking crash tho). Its obviously not for full on DH.
Warranty – Discount on the next one if its crash damaged (forget how much)
IMO the best thing about it is I can use it open face or full face on the same ride. Just bolt the face on as part of the padding up routine at the top of the more g-nar DHs. Makes it very versatile.
If they could make it tool free for fitting/removing the chin guard that would be good.