Using with iPhone 12 Pro. I purchased these with the intent of finding a longer lasting alternative to Apple Airpods (1st gen), so I will often compare this Sony set with Apple's in this review.NOTE: Not sure if this was the case with other buyers here, but I received what seems to be the Chinese domestic version of this model. The Sony packaging and paperwork was in English and Chinese (see included picture). Additionally, the default language for the built-in voice was Mandarin Chinese. I was able to switch this to English within the Sony Headphones app after setup. Its not a big deal, actually I think its pretty cool, but I don't think this was indicated in the Amazon listing.Pros:- Pairs quickly and easy to setup. iOS is able to monitor and display battery level in battery widget.- Active noise cancelling works amazingly. App allows for various EQ tweaks and noise cancelling settings.- Only tested for a couple weeks, but battery life feels extremely superior to my old Airpods.- Full set of foam and rubber in-ear pieces included for various ear sizes.- Sound quality is great out of the box, but I feel it can be improved with EQ tweaking in settings. Being in-ear, they definitely offer a more isolated and richer sound from original Airpods, which sound more open and natural.- I primarily use wireless headphones for running. These units are larger and heavier than Airpods, but not so big that they fall out after some moderate running and jumping.Cons:- Requires the Sony "Headphones" app to pair and manage functionality and settings. (Slight inconvenience over Airpods, which can be monitored and managed within iOS with no extra software).- Firmware was outdated out of the box. The Headphones app pestered my with software update notifications. Headphones need to connected, but NOT placed in the case during a software update.- I noticed somewhat frequent skipping during music playback. There is an option in the app to prioritize stable connection over sound quality, but this does not seem to help much.- Sometimes one unit will suddenly turn off while the other stay connected, even though both units are near my iPhone and sufficiently charged. The only fix I found is turning Bluetooth off and back on and then manually reconnecting via iOS Bluetooth settings.- Case is gorgeous, but much bulkier than that of Airpods. Its not comfortable to keep in smaller pockets or tighter pants.Overall:Great battery life and active noise cancelling make these a great alternative to Airpods that offer more features and customizability. These Sony units, however, still do not completely escape the typical problems with true wireless headphones, and they are less convenient than Airpods in a few ways:Skipping and connectivity issues can still persist.Compared to Airpods' design, they are bulkier, heavier, and have an in-ear form factor. The case is quite unwieldy.Compared to Airpods' sound quality, they sound more isolated and rich, but need to be tweaked about with EQ settings to get the best sound.Honestly if Apple Airpods were more affordable or had user-replaceable batteries, I would still chose them over other options, including this Sony set. For an iPhone user, nothing can beat Airpods' simplicity with iOS, and for me personally, they have perfect fit in my ear. But if I had to pick something else, these Sony headphones offer a good alternative, just not a real replacement.