They have been amazing so far, and fit my requirements perfectly! I wanted a headphone that had very low distortion (for maximum EQ flexibility), decent un-EQ'd frequency response, and be able to produce a good amount of bass. After applying an EQ that I made (designed to have the closest Harman 2018 compliance that I could get, from 20hz to 20khz), which is a mess of 37 filters, they are amazing, and I feel that they are very close to neutral now. I've also used Bose QC35II and Stax New Sr-3 in the past as well. If anybody would like to try my HE6SE EQ, it will be in the HE6SE thread.