Well,
I would have to say the isolation on the 1plus2 is pretty good. I live in Orange County and was listening to the Talking Head's "Little Creatures" through my DX90, sitting in my home office with the window open to the street - the front door to the house open as well, as it is still daylight and we have a nice breeze...
Then my daughter runs into the room and I turn off the music - she asks if I heard "that"
"That" being four gunshots squeezed off in my driveway....
Apparently two cars were racing down the street, one pulled into my driveway and the driver shot at the other car and raced away. NO, I didn't hear anything but David Byrne...
The police are gone now and some of my neighbors got license plate info - but if I was the only one in the house, it would have gone by unnoticed - Jesus.
The 1plus2 isolates enough when the music is loud. I'm going to have a drink now.