I purchased this the other day because sadly my 360 has sarted to get the dreaded red lights. I thought this was due to overheating so ordered this though once i recieved it the condition of my xbox had got much worse and wouldnt even boot up at all anymore. I opened it and tried it anyway but had no luck so im going to sell it and just send my xbox back to microsoft.
The intercooler is meant to be a really good way of adding additional cooling to your xbox 360 without having to open it. You can see a review of it here - http://hardware.teamxbox.com/reviews/xbox-360/58/Nyko-Intercooler-360/p1/http://hardware.teamxbox.com/reviews/xbox-360/58/Nyko-Intercooler-360/p1/
Its in great condition as ie never been able to use it, just open it. I purchased it from play for £15 and would like to sell it for £12 delivered.