Good neutral sound. Like to collapse them. Not the most comfortable naps. Works well for a few hours, then it's nice to take them off. That works well for the daily commute. Battery life seems good. NFC to connect works well and is convenient.

For a price of around 199 euros, Sennheiser offers an enticing package with the HD 4.50BTNC, combining quality sound, functionality and convincing performance into one neat product. Even better, you'll be able to find the model in specialist shops at an even lower price of around 140 euros.

The Sennheiser HD 4.50 BTNC offer a nice design, are reasonably comfortable, and sound great. Sure, there are better noise cancelling headphones out there - like the Bose QuietComfort 35 headphones.

I wear them all the time while doing yard work! A lot cheaper then some of the others and sound just as good.

Yes, if you are looking for a top-end noise cancelling headphone. At the moment this is among the best you can buy and comes with the added advantage of being wireless and versatile enough to work with all kinds of sources from laptops to smartphones. Go ahead, this is a good choice.

Not everybody can afford a premium wireless noise-canceling headphone, which is where Sennheiser's more budget-conscious HD 4.50 BTNC Wireless comes in. At $200 (£170, $AU329), it's not cheap, but it's less than what you'll pay for certain models from Sony and Bose -- and Sennheiser, too.

Sennheiser's HD 4.50 BTNC Wireless gets you most of what you want in a premium wireless noise-canceling headphone but costs significantly less.

The Sennheiser HD 4.50 BTNC Wireless is wireless noise-canceling headphone with effective noise canceling that sounds great and costs significantly less than Bose's QuietComfort 35; It works well as a headset and offers decent battery life; The headphones fold up into a simple canvas carrying bag.

Not quite as comfortable as higher-end models from Bose; Sony and Sennheiser.

The field of wireless, noise-canceling headphones used to be thin, but is swiftly filling up with surprisingly high-quality options. The undisputed leader is Bose, with the excellent QuietComfort 35. At nearly half the price, should Sennheiser's $199.95 HD 4.50 BTNC headphones make Bose nervous? The answer is complicated: The 4.50 BTNC do many things quite well, but also suffer from some performance quirks that might be deal breakers despite their relatively affordable price. Design Available in black, the headphones have a matte finish with silver-colored details. The plush circumaural (over-ear) earpads provide a hint of luxury, and they also function to passively eliminate a decent swath of ambient room noise before the active noise cancellation is even engaged. Despite only light padding on the headband's underside, the headphones are initially comfortable, though over long listening periods the headband can start to makes it presence known on the top of your scalp. Regardless...

The Sennheiser HD 4.50 BTNC headphones deliver a powerful Bluetooth audio experience and decent noise cancellation for the price, but some performance quirks hold them back.

Strong bass response matched with crisp, bright highs; Bluetooth functionality and active noise cancellation; Detachable cable for wired listening

Noise cancellation affects audio performance; Can get uncomfortable over long listening sessions; Not for those seeking accurate sound signature