The hub itself is fantastic - even without a PSU it delivers full speed and no issues. I love the fact that all ports are on one side compared to 99% of USB 3 hubs out there, which is great for my use, velcroed to the top of my keys/tracks rack for easy plugging.
But naturally it can only power that much before you need a PSU. And they don't sell one themselves. Additionally, the size of the DC port is smaller than most plugs on PSU with those power specifications. You can get hold of one, but you have to do a bit of research to make sure that the polarity is correct.
I have since upgraded my computer, and a new hub for other peripherals, so this sits as a non-PSU-powered extra 7 ports if I need them. I've had all 7 ports filled, connected to equipment that don't need bus power, and had no issues whatsoever. So I'll only draw one star for not offering a simple solution to power their own hub