I was intrigued by the idea of these and wanted a set of headphones anyway, so I went ahead and bought a pair.
They are excellent! Especially so for listening to good quality music if you have hearing difficulty. The concept is very simple, it’s just a good set of headphones with an equalizer and self calibrating program built into the cord. I would say that they will work very well for someone with about my level of hearing, or better. If you have a differential greater between high and low frequencies, they won’t get the job done as well.
For me, they do an absolutely outstanding job of reproducing sound, far exceeding the use of aids. Certainly I can get good results with a good digital equalizer on a pc, but with these, once you program them, you can use them with any device. PC, TV, Stereo, they all sound good with no extra effort.
I’m not sure yet, but it even looks like the cord and equalizer may be usable with other headphones. The cord and equalizer have 3.5mm plugs on each end. I’ll have to look into this and see what impedence etc. they need to function and not damage the equalizer.