I love my PBP's and use them at the gym religiously. I have AP1 and 2. I'm thinking about the APP but don't know if I want to drop another 250. I use my AP's for all my casual listening. No matter how good the APP's sound they aren't going to be mind blowing. My Bose QC20's are about the best I've had for Noise Cancelling and sound. They're just not Bluetooth. But they do work best for plane use since they can plug into the headrest for movies. I'm a junkie so I know I will eventually cave but the PBP are pretty damn good.