I ordered and installed the Bysksi Red Devil waterblock this week and also have the Eisblock being delivered on money (FINALLY SHIPPED), I am going to run some benchmark comparisons between the two for temps and overclocking. I am a little biased toward the Eisblock, mainly engineering, fit and finish as the Bykski is less refined. So far the Bykski has been working wonderfully, temps are quite impressive and it only cost $105 plus shipping, it just looks less refined, requires thicker thermal pads due to less engineering and machining so it may affect temps, it may not. I'll post results when I get them, should be fairly soon.