Pretty comfortable, decent sound, ok call performance, and ok noise cancellation. I notice the noise cancellation does a good job with constant sound but things like the pilot's announcements go right through the highest noise cancelling setting. The sound quality is solid and call quality does a good job when you're not talking. When you are talking, noises get through at a mid level. Nothing terrible but sounds will come through. Best thing about these headphones is the comfort and the sound quality
I recently purchased these headphones as I was looking for a pair that I could use both while working at home and at the gym. So far, I've found that these headphones are great. Despite a YouTube reviewer claiming that they slip during workouts, I've worn them while doing exercises like barbell RDL, Lying Leg Curl, and Hip Thrust, and they have not slipped once. I have been enjoying them, and they are definitely worth it.
My advice is to be cautious of the reviews you see on YouTube. The best way to judge the quality of a product is by using your own judgment after purchasing it and trying it.
I cannot in good faith give this 5 stars, because the battery life on these headphones is downright pathetic. My old QC 3.5's would last nearly a week. These ones I can barely make it through two days.
Now, that said...
Everything else is excellent so far. In fact ANC was the #1 reason I went with Bose, and whoa boy, the reviews were right. The noise cancelling on these are A+. I don't think I've ever used or demoed another set of headphones that were this great.
Sound quality is very good. I'm not a big audiophile, I'm more of a gamer. Games sound great and the immersive setting is an improvement over the QC 3.5.
I got these headphones as a graduation gift and they are the best pair of headphones I've ever used. The sound quality is perfect and I love the spatial audio.