Reddit rates both Risky Buy. The split is what you want: the QuietComfort 35 II — buy only if you prioritize all-day comfort and reliable noise cancellation on a budget. The Ace — buy only if you prioritize headphone sound quality and all-day wearing comfort above ecosystem breadth. Today's gap is $39: $340 for the Ace against $379 for the QuietComfort 35 II.

Built from 2,271 owner opinions across both products · 297 long-term reports · how we decide
58% would buy againof 1,387 owners
First 6 months 55% → long-term 74%+19of 270 long-term owners
46% would buy againof 884 owners
First 6 months 56% → long-term 67%+11of 27 long-term owners
The QuietComfort 35 II's record runs 1,387 owners against 884 for the Ace — weigh the thinner side accordingly.
No single component dominates
~1 in 3 long-term owner reports describe a failure — primarily the power switch, Bluetooth connectivity, and battery — typically surfacing between 12 and 73 months in. Of tracked warranty outcomes, 89 were resolved and 69 were not, so results lean resolved but a meaningful share lands outside coverage. Failure rate is about typical for wireless headphones: the category baseline is 24% serious failures versus 25% here.
Typically reported months 12–72 · 270 long-term owners
No recurring failure pattern measured.
These are the share of long-term owner reports that mention a failure, not the share of units that fail — owners with working units mostly don’t post.
Gap today: $39 — Ace is the cheaper buy.
Price links carry an affiliate tag. It never changes the verdict.
long-haul travel comfort and build durability matter more than pristine audio fidelity.
Sound and comfort as top priorities — owners who focus there consistently rate it above the category average.
Reddit rates both Risky Buy. The split is what you want: the QuietComfort 35 II — buy only if you prioritize all-day comfort and reliable noise cancellation on a budget. The Ace — buy only if you prioritize headphone sound quality and all-day wearing comfort above ecosystem breadth.
At $379 against $340 today, the QuietComfort 35 II costs 11% more and carries the same verdict tier.
QuietComfort 35 II full verdict →Ace full verdict →All Audio verdicts →