I finally got these going after a bit of a hiccup due to an internet cable failure out in the street (so I couldn't download the latest firmware, then had horrendous difficulty finding a way of actually getting the recorded files onto my Windows PC (where I couldn't install iTunes due also to said lack of internet). But I've not yet had a chance to get out and about with them.
I'm only just now testing the headphone aspect - general opinion seems to be that they are bass shy and very bright. Well, for me they have massive bass if I screw them into my ears as if attempting to cause brain damage. [First track of Max Richter's "Sleep" has about as low a low frequency pulse happening as you could wish to hear]. But they also do cover high and very high frequencies well, which for my tired old 70+ ears is great. The eq in the app is quite flexible despite having only three adjustment points, as you can at least slide them left and right as well as up and down.
Noise reduction is also pretty dependent on achieving a good seal at the ear, as one might expect.
Are they demonstrably better for recording than the Roland binaural mics? I'll have to test that carefully, somehow. But if nothing else they are an interesting device, and at the current kind of price I'm happy to add them to my arsenal of binaurals (Hooke Verse, Rolands, and this).