I think this is can be a great product. This is marketed towards mid-range systems, i5 with a 960, for example, and a 240mm rad should cool both components well. Im more interested to see how cool it can keep the GPU's peripheral components such as VRMs.
I think saying this will not handle high-end systems is an invalid argument because someone that spends $2000 for just a gpu and a cpu will probably also be willing to spend a couple hundred more for a custom solution, if needed.
What makes it invalid? If it's a high power draw system this cooler may not be up to the task. That's what they are saying. It has zero to do with costs and everything to due with it potentially not being able to perform well enough. Seems pretty valid.
Maybe I should have worded it differently, but saying it wont handle high power systems is pretty silly, because there is no one size fits all solution. What were they supposed to do? use a 480mm radiator to accommodate the 1% of enthusiasts running high power system that would actually buy an AIO?
Its sorta like reviewing a Toyota Camry and mentioning that it will perform poorly in a race track compared to a Ferrari. While that's completely true (as is the 240mm being insufficient for high powered systems), its irrelevant given the scope. You should only criticise something for what's its built for, not for something else. Clearly this system is not optimized for cooling a 500w cpu and gpu combo.
Now that being said, I would love to see how it would do trying to cool a 500W TDP; My guess is that it will "work" but the fan noise will be unbearable (atleast for me).