I've been able to compare them side-by-side with a pair of Bose QC35II and Sennheiser Momentum headphones, so that's my starting point. Build Quality: Build quality is good but not top notch. The plastic used feels strong and comfortable, while the faux leather material used on the headband and around the ear cushions is soft and comfortable to the touch. I would say the build quality is the same as the QC35II but not as premium as the Momentum which uses very premium materials (genuine leather, stainless steel etc.). Comfort: I found them quite comfortable. More comfortable than the Momentum (which isn't particularly comfortable) but not as comfortable as the QC35II. The only real comfort issue I had was that they warmed up my ears relatively quickly. They don't have the airy, open feel of the QC35II. Sound quality: They sound good! Not "audiophile" but very good for casual listening. Of the three I compared, my favorite is the Sony. I used a wired connection to my iPhone and listened to Tidal Masters tracks with my headphones off for comparison. The Sonys might not have the tonal accuracy of the Sennheisers or the clean sound of the Bose, but they sounded much more "lively" and "exciting" in my opinion, they were also louder and more bass-heavy. Noise cancellation: ok. Bose does a better job of noise-cancelling, but when you're playing music with noise-cancelling on, you can barely hear anything. However, you won't hear much if you play music and turn off the noise cancellation. I did notice an odd sound effect that's hard to describe, but when listening with the noise canceling turned on, there was definitely something wrong at certain frequencies. I believe this was due to the noise cancellation trying to drown out the background hum from my office HVAC system. It was annoying and I turned them off and stopped listening for a while. But it happened once, and it might have been the result of that particular song and background noise in that particular setting. Features: Sony includes some great features. The touch controls are intuitive and work well. In the app you have ambient noise control (noise reduction, wind noise reduction or ambient noise), VPT surround that simulates a concert hall, arena, etc., an equalizer, 360 Reality Audio, DSEE HX (which should enhance compressed Bluetooth audio), and you can Revain Activate Alexa or Google Assistant if you want. They also have NFC. However, the physical buttons aren't very intuitive or "clicky", and I have a hard time finding the power button while carrying them. Also, they can only be connected to one device, and the earcups don't fully rotate for storage... Oh, and no hard case, just a pocket. Battery life: This is good, most people will probably use it for a week (several hours a day) before needing a charge. Bluetooth range: Good too, I can walk around a 3,000 square foot house without losing connection or having any noticeable problems. Overall it's great, with a few caveats. Revain is currently heavily discounted as her set is downgraded and replaced with a new version launching soon. So if you can buy them at the current price (around $170), that's a great deal. At full retail price ($299) I would wait for a new version or there may be better options for a similar price.
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