I tried the other similar sort of thing: the Lightspeed Mach 1.
It worked very well but the slightest tug on the cable would pull out the earplug(s) enough to let all the noise in. I gather from some pilots in the USA that you really do need to spend the extra £50-100 on custom moulded earplugs for it.
The mike on it was far out the best I have used on any headset.
Due to it being in short supply when I bought it, I managed to offload it on Ebay to a pilot in the USA, for a reasonable price.
My guess is that these headsets are excellent for passengers. Especially a regular female passenger
There is the obvious hygiene issue with the earplugs which are not really shareable.