‘If it ain't broke, don't fix it.' We can imagine that came up when Bose's suits were mind-mapping the successors of QuietComfort 15s, which were the market's go-to noise-cancelling headphones for yonks.

If you're wondering how much better the QuietComfort 25 than the QuietComfort 15 , the model it replaces, that's hard to quantify. But one thing is certain: it is better.

The QuietComfort 25 model takes Bose's already stellar noise-canceling headphones and levels them up to new heights.

Extra-comfortable design; clearer, more dynamic sound; highly effective noise-canceling circuitry that's been slightly improved; new folding design allows the headphones to fit in a smaller carrying case; if the battery dies, the music now doesn't die; 21- to 30-day risk-free home trial.

Fairly pricey.

The sound quality doesn't leave to be desired. It's not perfect, but it's not far from it either. I admire how Bose is reaching for true sounds while still being fun and engaging. I hope that Bose continues to push the limit and make improvements to get closer to that perfect sound.

The QuietComfort 25 (QC25) is the latest model to join Bose's massively popular noise-canceling headphone lineup; it replaces the QuietComfort 15, the best noise-canceling headphone I've heard, till now.Weighing just 6.9 ounces, the QC25 is one of the lightest full-size models on the market, and its...

The best noise-canceler; period; Headphones can play after batteries are drained; Light and very comfortable

Sound quality isn't stellar

"The QC25 widens Bose's significant lead in noise-canceling technology, though it trails some other competitive 'phones on sound quality."

The best noise-canceler; period; Headphones can play after batteries are drained; Light and very comfortable

Sound quality isn't stellar

Before there was Beats, there was Bose. The QuietComfort line is the original über-popular headphone line, even if it's aimed more at business travelers than teenagers and celebrities.

Powerful lows and crisp, bright highs with no distortion at top volumes; Exceedingly comfortable; Best noise-cancellation technology available; Can be used as passive headphones without power

Runs on a AAA battery rather than a built-in, rechargeable option; Sculpted sound signature is not for purists; No auto-off function

There seems to be a lot of issues with the sound quality for these 2nd gen Bose phones. These came out before wireless headphones were in any significant use, and when few other companies were making a serious attempt at noise reduction.

Very very good noise cancelling; Industry standard for their time

Not intended for the highest quality audio

If there's one company that tends to do well in the field of noise cancellation, it's Bose. We've seen its headphones used by so many on overseas trips, and now we're about to see a new model on the heads of people who love sound, with the highly portable QC25i.

Battery lasts around 30 or so hours; Balanced sound; Headphones work when there's no power; Remote works for iProducts; Highly portable; Comes with a nice case

Cable ends in 2.5mm jack; Noise cancellation mics on the inside don't lend themselves well to excess vibration; Headphones could have more volume

I'm not a big fan of wireless headsets apart from a few exceptions and this review will portray exactly why I feel that way. Let's just cut to the chase, The Bose QuietComfort 25 is probably the best noise cancellation headphones I have ever used.

Refreshed design; Stunning noise-cancellation; Doesn't require battery for use; Sturdy and flexible headband

Design could be more imaginative; No customisations available in India

The new QC25s from Bose aren't perfect, but they're a worthy successor to the QC15s.