Let me add some of my thoughts. Firstly, I am extremely happy with these. The first time I put them on I notifed how comfortable they felt. Friends, with no experience with ‘proper’ cans, found that too. I’ve now had a few multiple hour sessions and I still find them very enjoyable to wear. The clamp is mild and coupled with the soft velour they feel pleasantly plush. Somewhat comparable to the Philips X1/X2. Soundwise they are certainly open and that is immediately apparent with the wide soundstage. Wider than the previously mentioned Philips. Obviously they leak sound, both in and out. If that is a problem then look further. On the whole these seem pretty flat to me with maybe the high trebles falling off a bit too soon for my taste. Bass extension is definitely there but bass is a tad lean. I have Xduoo XD-05 with a bass boost that works wonders for cans like these. The rather flat respons and wide soundstage (and maybe planar design) mean that reproduction is very clear, even tracks with a lot going on never seem congested. Build seems more than fine, nothing cracks, squeaks or rattles. The matte blue housing is a pretty dark shade, it could just as well have been dark grey or black. The materials are not sensitive to fingerprints which is always nice. The only thing I’m not to keen on is the padding on the headband. That does look somewhat cheap. The cable is quite and basic. It comes with a 1/8" plug and adapter to 1/4". I have listened to them mostly with the aforementioned Xduoo XD-05. They do work straight into an iPad, which can drive them to comfortable levels but never really loud if that is what you would like. There seem to be a lot of good headphones available at very decent prices recently and at a certain point you have to ask what they each bring to the table. For me the HE4XX are winners: very comfortable, great sound with no overt flaws and a more than reasonable price. They do need to be plugged into something that can get them to a volume with enough headroom. Of everything I have these feel most like the Philips X2 and at the moment I am liking the HiFiMan HE4XX a bit more for the added clarity and soundstage.