Like many who are looking to purchase these I picked them up because the price compared to the Bose/Sony versions. I'm writing this after using them for 2 years.
- Durability
I bought these for travel and to use at work, I don't travel that much, 2-3 times a year, and always carry them in the included case. Cracks began to appear along the sections holding the speakers after about 18 months, at first I thought these were cosmetic (expecting a metal piece to be what held the speakers) I later realized that there is no metal parts. I fixed both sides with JB Weld which appears to work well. The cushions are beginning to flake, and I reached out to Monoprice and they are not replacable so I will have to figure something out.
-Noise cancelling
They do a reasonably good job with ANC enabled but it appears that the microphone array is configured such that how your head is situated compared to the sound source is important, I find myself having to cock my head somewhat (maybe pointing my nose 10-30 degrees off from direct at the screen) in order to get good noise cancelling performance.
-Audio quality
Here I can only compare them to ear buds and really cheep headphones, that said, I'm very happy with the performance.
- Connectivity
I'm not sure how to articulate this as I'm not sure how much of this is the devices I'm connecting to and how much it is the headphones so I'll just compare to my Raycon Impact earbuds. Where my earbuds typically have no issue connecting to both my computer and my Android phone for calls and music these only seem to be able to connect to one for calls and music and the other for just music (or simetimes just mic) This means if I have Teams/Zoom calls secheduled on my computer I have to effectivly dissconnect from my phone.. This might be a problem between the chair and the keyboard (better known as operator error) but it is quite annoying.
-Comfort
I'm an eyeglass wearer and it really depends which of my glasses I'm wearing. My general purpose eyeglasses have somewhat heaver stems where my computer glasses are somewhat thinner, thinner is better, when wearing my general purpose eyeglasses I have to tilt them somewhat to reduce discomfort.
-Upgradability
They do not appear to be upgradable at all, no firmware updates, etc
Overall opinion. I like them but be careful with them, if you start seeing cracks grab yourself some JB Weld and slather it on (and if you are better than me then file/sand it down so it looks good) to reinforce the cracked areas before the cracks become problems.