It's just not about volume of air but more about pressure when it comes to rads. Extra volume of rad size won't really help over, say copper rad because you already have sufficient rad space. Most people run Zens. The 360 is pretty quiet and well performing there.

While it's good to see non-Asetek based AIOs providing competition with top tier performance, their 2 year warranty gives me pause. Sometimes the warranty length does not directly correlate to the company's confidence in their product, but since Arctic is, from what I gather, still quite new to the liquid cooling market I'm leaning toward more established companies for my new build in a couple months.
Regardless, I expect GN will get their hands on one of these new 420mm units and we could see an interesting video showing how cooling performance scales with radiator size/volume using 120, 240, 280, 360, and 420mm units in the same product stack.

Asetek units are a big time rip off, and never had serious good reliability. They had issues ranging from pumps dying to Corsair lights changing colors. The Liquid Freezer II, currently, IS the AIO.

GamersNexus rated the 360 version as the top performing AIO in their testing and also one of the better-designed AIOs, so here's to hoping this one is just as good.

I have a LF II 420, its performance is amazing for a 5950x, but the tube length is way to short. 420 is a HUGE radiator and fan set up. With that said, you need a HUGE case to fit it... Bigger case means that the the distance the tubes need to go are much longer than say a mid tower with a 280. If the tubes were an inch or two longer it would be perfect. Mounting with tubes down on the front of the case - there is no way for the tubes to make it over the GPU (especially non founders edition 3080s/3090s). Top mount is ok, but in such a large case with the short tube length you pretty much have to mount it were it fits - and don't have enough tubing length to make the case look and feel how you want with your other components. Definitely recommend this cooler but buyer beware this thing is incredibly big (in all dimensions - thickness too) and the tube length is a bit too short for how big a case you will have to have to even mount it.

BArmsCould this fit in an nzxt h710 I wonder?

had the 280 and 360.
neither are fit in the H710
Top mounted (the NZXT Method an stock reaches about 1CM over the ram slots)

front mounted is so thick that you can't fit the tubes from the bottom to the CPU without bending it like crazy