I'm the type who uses over the ear studio wired headphones. But over the period using the Jabra Elite 75t, I was pleased with sound quality and passive isolation of the headphones. They easily hold up to 2 weeks of regular use charge and the case tops up every time they're popped in. The case is small enough for the coin pocket of my jeans which is handy. USB-C charging is a gift and one less cable to carry. I didn't have any connection issues with my phone, however, my Chromebook kept losing connection which I think is down to the laptop not the headphones. The app has good customizing options but not to the extent to make it essential. Not having it wouldn't make much difference in the usability and features of the headphones. The most useful section of the app for me was the user manual which isn't included in the box and makes using the complicated button combo configurations a bit difficult. Once the buttons are mastered they are actually pretty feature full. When actually using the app, control of the pass-through feature becomes available which I've loved using the headphones around the office, on the tube, and at home when I also need to hear what's happening around. The option of using just one of the earpieces is also very cool for calls and quick audio. My ear fit is pretty standard so I never need to change the default tips but the headphones do come with 3 sets in case. The headphones have already gotten 2 updates since I got them but can't really tell what was updated because that info wasn't provided.