What the experts say
Noise cancellation is the real strong point of the QuietComfort 35 ii's according to Expert Reviews. The sound quality isn't half bad either. Overall they are "simply brilliant"
What Hi-Fi agreed that the noise cancellation was spot on but felt rivals could more or less match them and offer better sound quality (most notably Sony's WH-1000XM3). As the name suggest though, nobody can match these headphones for comfort.
Tom's hardware loved the sound, noise cancelling and the addition of Google assistant. The price was the real sticking point. Given the have come down in price since this review was written, you might want to consider this a 5-star review.