I am not a huge sound nerd, but I own a pair of these buds and had to take them out at a busy railway station because it was weirdly quiet and couldn't hear the trains. I think the noise-cancelling is great.

I also own an XL pair, and I have two complaints:

I have a big head, and it puts some pressure on the thing as clamps on my head, I've broken two of the little plastic parts between the pads and the top arch so far. It was from material exhaustion, they snapped. Silver lining was it was super easy to swap out, literally 20 seconds with only a screwdriver and a single screw, and I got their customer support to send me a replacement part in a week both times.

I hear odd noises when I try to use it when plugged in and charging. I suspect it might have to do with Windows, but still. It's barely usable, but the charge lasts long enough to make me not care.