Hi guys, I just wanna express my appreciation towards Bose Customer Service. I bought Bose QuietComfort Ultra headphones 3 months ago because i heard about how good its ANC is. Everything (ANC, Audio, feature, ease of control,...) about it was amazing (I wore it everyday for 7-8 hrs). However, after 2 months, the right earcup started making high-pitched noise, right-side ANC stopped working as well and I didnt know why. Then, I found out that Condensation might be the issue after doing some researches and it was. I wiped out all these Condensation located under the inner fabric of right earcup and everything returned to normal. Afterwards, I wore it less due to fear of condensation but it still took place. This time, the condensation somehow got inside of the right inner microphone, which disrupted the microphone and caused these constant grainy sounds similar to that u heard from old radios. I couldnt do anything to fix it so I contacted Bose Customer Service. To my surprise, they were absolutely NICE, CARING, ATTENTIVE and HELPFUL. After I told what happened, they just said due to mine still under warranty, they would just replace my Broken Bose into a new one (no extra fee, no shipping fee), which was incredible. Tbh, I expected it to be more challenging to get my Bose fixed after seeing many online posts expressing how bad CS of Sony, Apple... is and ppl couldnt get their headphone repaired without fees or replaced despite it still under warranty.

P.s: I am not a Headphone expert and Bose QC ultra is my first ever pair of headphones. I am super impressed by how amazing everything (control, headbands, ANC, Audio,...) about it is. Besides, I think Condensation is not the issue pertaining to Bose only but also other brands as well bcs I have seen similar Condensation Complaints about Apple/Sony Headphones. Things happen and Products U buy may/can not 100% function as intended. Thus, what matters is that Customer Service is willing to assist you to have your broken one repaired/ replaced without any extra fees as long as it is still under warranty to ensure you have best experience with their product. This is a one-person experience (yours may vary) but honestly, after this Bose CS interaction, my trust towards Bose is increasing by miles. I am looking forward to their future ANC headphones.