> I'm constantly frustrated by the amount of coverage these get when, if you've ever studied any kind of neuroscience, you realise quite how vague the data is, and how much over-interpretation goes on in the advertising for these products.

I blame engineers here. I have a neuroscience background myself and know what you're talking about. Engineers, in my experience, can't really grasp the nature of neural signals and do seem to over-interpret them quite alot or just misuse them.