Reporting in on these after a week or so of ownership. They are light and comfortable. They appear to fit either way, but they have a clear left/right distinction when trying them on, but they are not marked left and right. That's rather odd. The stiff wire headband is not causing any problems, I barely know it's there.
I'm gave them a couple of hours of break-in. I was hoping the bass response would improve but they are still bass shy. They are very efficient (loud!) so my volume settings are all reduced, which should mean less distortion going into the headphones.
The main goals were for them to sound decent without giving me wicked tinnitus outbreaks or headaches after extended use. They have met these goals. A little more bass would be nice, but listening to anything on the web is not something to be taken all that seriously. If I were to build a dedicated sound server PC I would opt for a sound card with high quality op-amps or replaceable op-amps and better 'phones that this low cost pair.
The parts that actually touch the ear appear to be a leatherette type product. No need to replace open cell foam every six months or go with any foam. Since they rest on the ear instead of encasing it you don't end up with long term sweaty ears. Your ears still breathe, at the expense of bass capabilities. It's a fair exchange.
Bad - The cord is very short. I'm relying on a very long extension.
I'd recommend them as long as their limitations are not an issue for you. I have no idea how loud they will play, and have no intention of finding out.