Apache might be one of the best commercial LED lights on the market? It cost $4-$6/watt for the AT series. I am skeptical about its design and claims along with every other commercial panel I have studied. The main reason is because of efficiency. 600HPS is 35-40% efficient when brand new and a pretty decent flowering spectrum at 2000K. 600HPS cost $200 for bulb ballast socket and reflector. So that is the competition if you are building a large flowering LED.
-There is no mention of the brand or bin of LED they are using. This is critical. Cheapo LEDs running hot could be as low as 15-20% efficient. When they don't specify bin, that is either because they don't know or because they know better

You should assume the worst here.
-There is no 660nm in the spectrum, love it or hate it is it better to spread out your red as much as possible.
-Way too much blue. I have gone as high as 20% during flower but they are 35-40%.
-Compact design requires active cooling wasting power.
-High input power, how efficient are the drivers, how much power are the fan using, how much heat am I adding to my room? The AT120 draws 180 watts. Ideally that number should be 132. Either they are driving the LEDs harder than 350mA, the drivers are very inefficient or the fans are robbing tons of power. If an AT120 draws 180 watts, does the AT600 draw 900 watts? If so, there is no significant power savings over the 1100watts of HPS. Plus with the HPS we can keep the 100w of ballast heat out of the room. If these LEDs are running at only 20% efficient as I suspect they are, these lamps actually put more heat in your grow room than HPS and charge you 15X the price for it.
-Shining through lenses or acrylic covering. Lenses and coverings rob 10-15% of photons. This is required in order to have a compact marketable design, but better to be bare and spread out.
-14 degree lenses require tall ceilings and waste vertical space. If you keep them too tight on the canopy it will just cover a smaller area and potentially bleach them with hot spots and poor color mixing.
I'm not hating on Apache just trying to be objective about commercial LED capabilities. It would be very hard to commercialize the KNNA DiY LED design and it is very time consuming to build. But if you want the best you got to do it yourself.