3 stars considering I nabbed these for like $38.
Build quality is decent although not as good as the original Active Solace cans. Sound quality is pretty good although they don't have a lot of punch. Bass is not bloated or boomy but has little oomph. Clarity reasonable. NC is deceptively effective. A highlight is the sound quality seems unaffected when NC is on regardless of strength and the NC works well. My biggest complaint is the volume: simply not loud enough. For $40 these are fine yet at anywhere near $100 a disappointment. Not lousy cans I just don't feel these earned the Monolith badge. I own the liquid spark DAC & amp, M650 open-back wired cans, the USB stick style DAC/amp, etc. All those punch way above their price, love them. These NC BT cabs should be under the regular Monoprice name, not worthy of the Monolith name in my opinion. I'm a Monolith fanboy, I want to brag on those products. No such luck here.

I've been disappointed with these headphones. I've had two pairs of the Sonic Solace and loved everything about them except their weight. I got the Monolith for its lighter weight and expected the same quality sound and functionality. Alas, they don't measure up. They don't automatically connect to Bluetooth and have to be manually connected every single time. The sound is thinner, the noise canceling less effective and the controls are maddening. The double tap to stop/start is particularly bad. I'm keeping them for extended wear at the office where the weight is a benefit, but I can't recommend them for anything else.

Excellent sounds but there is a issue with the power I can never get it to shut off.

Scratchy sound on Bluetooth connection, uncomfortable on top of head

The sound is decent. It is comfortable to my normal sized head. However, it cannot be used for zoom meetings. The mic volume is very low, even after turning off noise cancelation. Nobody can hear me talking in the meeting.

overall, good for music, not so good for zoom meetings.

Noise cancelling does not work when you plug in the headphones using the 3.5mm jack as you do when on planes

These Bluetooth headphones have all of the features and sound quality of the " big name" headphones for a fraction of the price.

Coming from Bose qc 35 for comparison. These headphones are just ok. Not even close to the Bose. Sound quality is just ok but the volume level max is way too low. I could barely hear my movie on last flight. I was hoping for bargain replacement based on monolith name but these are not worth the 129 I paid. Don't recommend

Sound is good. ANC is very little but it's there, worst thing is they can not do loud. So it's you're watching movies or hearing something with dialogue it leaves you wanting a lot more. For music the loudness is ok, Unless you want to really rock out.

Awesome very impressed with the audio quality