ITG filter has arrived and has been fitted. It seems much better quality than the Pipercross. The top of the filter has a metal mesh not plastic and it comes in a sealed bag, pre oiled unlike the Pipercross.
Its no where near as deep either, and is roughly a third the depth of the OE one. Fits snug as a bug in a rug.
The Pipercross filter came in a box with a can of oil and that was it. This one has care unstructions with it, a sticker! and a sticker for the airbox to tell the garage not to change it at service time.
I suppose only time will tell if its going to fall to bits or not. Apparently it should last 3 times as long as the OE filter, with the occasional check.