I watched a vid on Youtube where Gabe showed off this unit against the H100i and TT Bigwater, all other parts being identical. Pretty impressive from every measurement. Even with adding GPU cooling on dual cards it rocked.
Matt, hurry.
One little secret about that video demo (by linustechtips) is that the swiftech units in the demo had a lower VID. The unit on the far left (Swiftech) in the demo had a VID of 1.17 while the unit on the far right (Tt) had a VID of 1.25. The corsair unit, second from the right, had a VID right around 1.23. That isn't a huge voltage difference, but the overclock on each machine was applied by using ASUS automatic 4.6GHz settings... The resulting voltage actually provided to the chip will vary, based on VID. This was not hidden, the VIDs were right on the display monitors, and they told us exactly how they applied the settings.
So the demonstration setup could have been made more level had they manually applied voltage and frequency settings rather than using the automated 4.6G mobo feature. But that said, there are design advantages to the Swiftech unit that likely give it a performance edge.
While we were there we observed readings but we didn't report any of those, because at the end of the day its a manufacturer demo. Instead we asked good questions, talked A LOT about the design, and really took a good understanding away of the time and effort that went into making a Swiftech All In One unit that wasn't Yet Another Asetek/CoolIT rebadged unit.
If considering an All In One to get into watercooling, to me this H220 seems like the only right answer. Most importantly for people like us, it is the only one with an upgrade path - you can add more components to it without much trouble, and it has had more research and development put into the pump to ensure it can support a growing loop beyond what it ships with.