Well I asked a reviewer on Amazon how he felt the Pendulumic sounded when compared to other bluetooth headphones and this is what he said. First review comparison I've seen for the Stance headphones.
I saw you comment on Amazon.. Also, if you notice, two of the reviews were from people that were GIVEN the headphones.. Also, since they were offering them on Amazon, which I know from experience has a top rated return policy, I checked the one from this vendor.. Low and behold down in fine print, there is a 20% restocking fee. and I think shipping charges.
Plus, without any clear unbiased reviews, I am laying back on these.. Plus, from the price, looking at the specs, my novice mind would put these in the class of the Harmon Kardon BT, and the Sony MDR 10RBT.. Prices are about the same, I say specs are about the same too. I am quite sure performance will be the same. Now, off the top of my head, I don't think these will be in the class of the Sony MDR 1RBTMK2, Parrot Zik, or the Senn 550 X, I stand to be corrected..