I just came across a video where someone who runs a substantial business recording classical singers in London has reviewed the H2essential from the point of view of classical singers making their own demos. Clearly he has enough business not to worry if some potential customers adopt a DIY approach.
Anyway, he has done a unique test of the H2e where he compares it with a recording made with an expensive AEA R88A stereo ribbon mic at the same time (into an unidentified recorder). The subject is a soprano with piano accompaniment. He acknowledges that the Zoom is a bit brighter/thinner, but then he applies some eq (and a touch of reverb) and compares again, and the result is quite persuasive. Given that he can claim to know what he is talking about, it's good to hear that overall he's impressed with this very cheap device.
https://youtu.be/W1NLVLp0qMA?si=X_rCuJdLYvvdaUKC&t=515The comparison is at the 8:35 mark - the link should take you to that spot.
I've contacted him at his company to thank him for the video - and to point out that the H2e doesn't have dual ADCs which his introduction kind of implied that it does. But that shouldn't be an issue unless the H2e was placed stupidly near to the soprano.