Some users mention a buzzing sound in one ear, which Bose acknowledges as a known issue on their website.

Instances of one earbud being dead upon removal from the case are common, with connectivity issues also noted, impacting reliability.

Some users have found the touch controls overly sensitive, leading to unintentional commands during activities like jogging.

Owners report the microphone quality as poor, especially in noisy environments, making it unsuitable for phone calls.

Certain users find the earbuds uncomfortable or prone to falling out, likely due to design changes affecting fit, especially during physical activities like jogging or gym workouts.

Some owners report Bluetooth connectivity issues, with frequent disconnections and difficulties maintaining stable connections on various devices.

There is no option to deactivate touch controls, leading to accidental commands during adjustments, particularly frustrating during activities like jogging.

Some users report a thumping noise during physical activities due to the lack of an air vent in the earbuds, which amplifies body-transmitted sounds.

Bose Quiet Comfort earbuds are noted for strong noise cancellation, particularly effective in reducing ambient noise during commutes and factory work.

Known for having a powerful ANC, the QC Ultra's ANC is considered superior by many, even better than AirPods Pro in reducing ambient noise.

The Bose QC Ultra earbuds feature an EQ in the app, allowing users to customize sound profiles to their preference.

Refurbished sets are offered as replacements but priced lower than new ones, sometimes accompanied by a small refund to address customer dissatisfaction.

Earwax can clog ANC holes, potentially affecting audio balance. Regular cleaning every two weeks is recommended for those with higher earwax production.

Replacement cases are costly and can be challenging to find in stock, priced at £89 in the UK, causing frustrations among owners needing replacements.

The case is described as bulky and lacking wireless charging, with some users noting it feels cheap despite its premium appearance.

Some users have experienced static noise issues and malfunctioning earbuds, with replacement units sometimes exhibiting similar faults.

Users suggest the Sony WF-1000XM5 as an alternative with better sound quality, though slightly lesser ANC performance.

Multiple users experience issues with using the earbuds for Teams meetings, as the microphone often fails to connect properly on both MacOS and Windows platforms.