I have owned these earphones for the last three years or so. Rarely will I say that I come across a product that is life-changing. These actually are. These are beyond ideal for the frequent traveler, especially for air and road travel. You will notice the noise reduction immediately. This is evident when you switch on and off the "aware mode" mid-flight. That apparent loud hum is completely neutralized to near silence. Noise cancelling technology is not yet perfect, as of 2018. There are areas for improvement. These earphones are not capable of drowning every sound around you to silence. Bose has not yet developed something that powerful, though I would imagine and hope that in the coming years or decades we will see essentially perfect noise cancelling technology emerge. Every sound around you, from the crying infant one row ahead to the sporadic street noise outside your apartment window will be drowned to silence. We can only imagine and eagerly await that future! These earphones are incredible and I can identify few flaws. While durability is of some concern, this can be addressed by a good warranty. If there is anything more immediate that I would suggest in terms of improvement, it would be to develop a set of noise cancelling earphones exactly like these, but with Bluetooth capability enabled. This is so that an iPhone 7+ user will be able to listen to music without an auxiliary adapter. My recommendation is to simply put out a version of these without the headphone jack (or with a removable headphone jack) and have it such that the necessary Bluetooth features are installed within the main capsule. I cannot recommend this product highly enough.