Fitted a new Kraken Elite 360 v2 AIO today, was previously running a Kracken Z73 360, but that was 4 years old now and I'm convinced the pump was on the way out, as it made a couple of odd noises recently, then on Sunday, I came in to my office after a few hours away to see that the PC had shut down and upon powering it back up, the display had a reading of 105c so obviously pump had stopped and it shut itself down.
Temps seem a tiny bit better, the contact area on the cold plate is better than the old cooler, which had a circular plate as opposed to a square one with the V2. Idle is still 40-42, gaming around 65 average, and cinebench after 30 minutes was 76. Only 2-3 degrees difference across all 3 scenarios but at least I don't have to worry about the pump on the old one. Fan curve on all 9 fans is the same, fixed at 950RPM to keep it quiet
Also have gotten mine down to -25 CO, I could try for -30 but find the long stability tests each time I adjust it a massive PITA