First things first. This was my first purchase of a noise cancelling headphone so wasn't sure what to expect. Being no audiophile, but into dynamic sound in all types of music and convenience of wireless, I was compelled to thoroughly approach my search with an open mind. NC cans appealed to me because elimination of surrounding noise enhances music listening. Along with this I watched and read hundreds of reviews on many different headphones, primarily focusing on Sony WH1000, Bose QC35II, and PXC550.
-So now, I know the answer to finding and selecting the correct product for any one person- and that answer really hinges on the following question: What are your headphone priorities? Once you learn the answer and "prioritize them" only then can you select the correct headphones. Do you know your priorities before you start sampling cans? In my case the answer was a resounding no! That's how I ended up with the PXC-550's! But that is just the beginning of the story, because this quality product helped me eventually to prioritize what I needed most out of a headphone.
My small head- (size 7-1/8) PCX-550 fit well.
My big ear-(Picture Mr. Spock, or a boxer) PCX-550/Small ear cups
I wanted these cans! Great quality, decent sound, hi-tech, highly adjustable! In the end, I learned for me all this is null and void if you don't have a proper comfortable fit. So, for me, the #1 priority ended up being comfort! If they don't fit, you are constantly fiddling with them and then you're moving the cups around and the hi-tech of swiping for volume control, etc...works against you. Sound? Yes WH1000 sounded great, but again those are heavier and bulkier so we are back to comfort. I wouldn't, couldn't wear those in a gym (small head needed a cap just so they fit right! Speaking of Hi Tech, another priority..turned out to be fairly low on my list after all. Are you buying the phones for relaxation or to fiddle with the tech features, always trying to derive something better in the music, silence or whatever. Okay, so the bottom line with these cans is " You can't always have your cake and eat it too, so you better prioritize for requirement. In the end, I went for Comfort, Sound, Noise Canceling, Ease of use, then hi-tech in that order.
Returned the PCX-550, decided against the WH1000, picked up the Bose QC35 II.