Well those are very rare units but when they work there is nothing out there like them even traditional water cooling doesn't come close to the thermal improvements. I don't see how people don't know what they are after all the rage generated years ago about them since the socket7/slot1 days up through to the 775 era.
Today after 1 hour of OCCT, 20 passes of IBT and more than 15 hours of Blend Prime 95, I finally achieve 4 rock solid GHz in my Q6600 with 1.552 VCore and a max temp of 7C on IBT Load.
Everybody dislikes the vapochill but I think it's great and not very very expensive today.
Thanks everybody and trust me, that guide for GTLREF is awesome, tunning it, overclock, soft test with 5 pases of ibt to quick check stability and then one hour of occt, then 20 pases of ibt and last, prime 95 with one or two steps up in vcore and that's it, a + 60% OC in one day!!