comparisons - the other two BT headphones I have/had are the Sony XB950BT and Pendulumic Stance S1+. Compared to the XB950BT, these are a class above. The XB950BT always sounded a bit dull/congested to me. Even with the dynamat mods and EQ coulnd't really get them to sing. The 1ABT have a significantly better sound stage and a much better controlled bass response. Isolation wise, the XB950BT are a bit better, even though they seem to have the same pads as the 1ABT? Comfort is similar, but the 1ABT is better because its lighter. Less sweaty pads with the 1ABT than the XB950BT. Compared to the S1+, basically the 1ABT takes the excellent highs and mids of the Pendulumic and adds in a healthy bass response. The Stance s1+ to me sounded full, but lacked the bass rumble. Like it only went down to 150hz or so and nothing below that. the 1ABT fixes that. I still like the controls and the looks of the Pendulumic better, but comfort and sound go to the 1ABT
Overall I think the MDR-1ABT is money well spent. I will be keeping them.
BTW if anyone is looking to pick up a pair, I got mine from e global central. They are selling them at a really good price with free shipping. I am in no way affiliated with them, just wanted to share a killer deal