I got one couple of weeks ago,although there was a bit of mix up and Nick sent me a mk2 IK instead of mk 1,only difference is the air feed position,im getting new bits tommorrow.I have it on just now using the standard air feeds.Dont know about power increases have to wait till i get it on rollers. Although i think it works better with Grp N ecu,which im getting tommorrow.As for the noise,i cant hear it as ive got a Supersprint 70mm race system so i cant hear f all above the sound of that.
You may think the price is a bit steep but you get the silicone intake hose with it and its really well put together.So i think its worth it.