We ended up getting 8 of these, building two columns between . ? The only suggestion I have is they should sell by size, cause now I have extra small and medium one that are useless to me and are just going in thw trash. So far no problems, sound is great can hear things pretty clearly. I initially, I thought these would be removable because most of the 3mm hooks I buy are. 5? tall and 4. The Engage 65 took some time to setup, requiring a call to tech support due to lack of instructions. I have them EQed to remove as much bass as possible, and while its still too much bass, its listenable. I can finally replace my shredded Logotech headset now! I havent had any bad experience from my usage. Originally purchased these for assisted pull up progression.