I went from a H80i to the Kraken x61 - The H80i had a problem cooling when PC was under load, temps went to 85-90° just watching youtube.
The problem develop over time after purchasing it in October 2014, changed to the Kraken X61 OMG what a piece of kit runs near silent compared to the H80i and is so much better performance overall. Idle temps down to 22° using a i7 4790k running at stock boost speed 4.4 and full load not gone above 72°.
The noise levels of the H80i was very load too, the fans could be heard in other rooms of the house. The Kraken is near on silent
Now the software side of things had a similar story. Corsair Link would not recognised my second GTX 970 in SLI and would at its own accord alter my fans speeds for no reason and fter doing so all it changed was the volume of noise as it had no effect on the displayed temps at all. NZXT's CAM software has been absolutely flawless works exactly as it says it should. I could not be any more happy.
Only regret is I should have done more research and changed sooner.