Update: After 30 weeks of weekday use as my daily drivers for conference calls and at-desk music listening, I performed a one-handed removal instead of lifting both ear cups with two hands. CRACK. The thin plastic inner strip at the top of the left earpiece slider snapped off. If I can find where it went I'll glue it back in and reinforce the area. As this appears to be a common failure others have experienced, caveat emptor. It's a shame. For the price and for how I used them, I loved these cans.
My pair arrived yesterday. Overall, the value is outstanding. I'm wearing them right now, monitoring a conference call as I key this. I find them quite comfortable, even on my melon-sized head. This is so not the case with many headphones.
They definitely have the closed-back headphone lack of broad soundstage. Overall, I find them to sound slightly muffled, but very musical and non-fatiguing. The foam over the drivers probably contributes to that. The mid-range is wonderful. Vocals and acoustic instruments seem to be their sweet spot. Bass is a tight, significant upgrade over the ear-cutting Sony MDR-7502's that I may never put on my head again. They would not appeal to bass junkies, like my son. His big, blue, bass-boosting Sony phones work fine for him. I ran the Matrix2's through my new gear playlist and found these three selections (see below) really put a smile on my face while listening, which means the phones lack any pronounced peakiness, and can deliver a decent punch when the material presents it, as in the Paul Simon song. (I also listened to quite a bit of classic, alt, and punk rock, as well as jazz, soundtracks, pop vocals, and chamber music.) The physical comfort and lack of shrillness, boominess, or sibilance means these can be worn for long periods of time. I think I found my new daily drivers, and at a price that was very very sweet.
Luke Brindley - "Wrecking Ball" - you can hear the round wound quality of the guitar strings being played
Kate and Anna McGarrigle - "Heart Like A Wheel" - this masterwork of vocal and instrumental overlays sounds distinct and poignantly sweet
Paul Simon - "Diamonds On The Soles Of Her Shoes" - mid-range to die for and a nice bass punch that made me respect the way these phones handled the bottom end