Attended the listening event last night, and I have to say I was really surprised (in a good way) by the Pandas. I brought an SP1000+Amp w/ 6xx as a reference point, and the Pandas pretty much stomped all over them. The 6xx have a polite, laid back voicing, and the Pandas are very detailed and clear by comparison.
Mids are excellent. I picked a couple tracks that have chorusing and other layering effects, and imaging/separation was excellent. Picked NIN "Copy of A" for the bass hits early in the track and they were suitably impactful and articulate without being too forward in the mix.
The Pandas do sound "closed," but they do it well; the overall sound is coherent and even. I didn't find that to be a fault with the Pandas, but it's a data point.
I did find them to be decently isolating (particularly with music playing). I am not a fan of ANC and glad these don't do that. The Pandas would work well in an office environment.
The closest thing to criticisms I could muster would be comfort-related, but the Pandas were not uncomfortable. I'd just like slightly bigger earcups. I could appreciate a bit more plushness in the pads. And some other cans like AKG 7XX are just better at all-day comfort factor.
Still, nothing disappointed. Build quality looks good. Audio quality was exceptional. And the convenience factor of being wireless is amazing given everything else the Pandas did well.
I think these are going to be another win for Drop. Nice job, folks!