Just got mine yesterday, took the Amazon seller two days to ship it out, but otherwise got here just fine. Really, really happy with these.
Now, I'm not an experienced audiophile, but I'd like to think I have at least an idea of what sounds good. So, take everything I say with a grain of salt.
Unfortunately, I don't have a great way to drive these right now, still doing some research on that. For now, it's either straight out of the iPhone 6+, Macbook Pro, or a fully balanced reference-class Sonic Frontiers tube pre-amp. FYI, for anyone that has experience with those units, it won't drive the HD700s unless I use the SSP (surround sound processing) and I'd love to figure out why that is. It auto-mutes when I plug in the HD700s if I use any other input for the source. Anyway....
First used them on the MBP, just to get a rough idea. First couple minutes were incredibly harsh, as to be expected. Just needed to get broken in. However, they immediately softened up. Despite the utter lack of power, and what I'm sure is a less than stellar DAC in the computer, they did sound pretty great with all my 24/96 files. I have a few 24/192 files, all of those seem like they were transferred very well, going to listen to some of those tonight.
Listened to a few tracks of U2 - War, as many of those tracks have a way of pushing headphones to the limit. Sunday Bloody Sunday in particular is a pretty hard-hitting song, this is not a remastered rip, so it's a bit bright, however it sounded great on the HD700s. Lacking in bass, until I equalized a bit. Also listened to a few tracks off of Fun's debut album, a few songs off of Bonobo - The North Borders; Jay Z - Black Album; Kid Cudi - Indicud; STRFKR - Miracle Mile, and a couple tracks off of Bridge Over Troubled Water. All were 24/96. All sounded great with the computer alone, especially after letting the headphones work for a bit. Really softened out. Tons of detail, as expected. Great soundstage even with the internal DAC.
After this, hooked up the MBP to the Sonic Frontiers tube amp, and tried to see what it would do. Unfortunately, since I'm limited to SSP input, I didn't have volume control via the amp, just had to settle for the computer. Even so - wow. Unreal. Amazing clarity, plenty of bass, and very full-bodied. Overall they are slightly bright headphones, but I'm ok with that. There's nothing I hate more than muddiness or lack of clarity. These don't have that problem at all. I think even this amp isn't quite up to the task of driving these things, it's just not made for this application. Also, again was using the SSP input, not sure how that affected the signal, and was also using the stock DAC and volume control of the computer, so I'm sure that didn't help. I actually wanted a little more driver control under 100 hz or so, but now I'm stretching. Not practical to listen like this all the time, as the amp is in a stereo cabinet for the other hi-fi stuff, but it's fun right now. All I can say is - with anything like a proper headphone amp and DAC, these should be stunning. They're already stunning with the Sonic Frontiers unit.
Straight out of the iPhone, I actually think they sound better than straight out of the MBP. Less power to drive them, but IMO, a better DAC and more accurate sound. Also less bright, although maybe by the time I got to that test, they were worked in even more. Hard to say. All they need is more power, for more volume and harder-hitting bass. Clarity and accurate is still great.
Overall, I can't say if they're worth the price, as I don't have much to compare them to apart from my TF10s with a custom cable and Comply tips. However, I feel happy with the price I paid, and I really enjoy listening to them. I'm thinking of picking up a Fiio E17K in the short term, just to have something portable, inexpensive, and effective. Long-run...I'm going to save my pennies for the ALO Dual Mono, if I can. That thing looks amazing. For now, I'm happy with how they sound, as I knew I'd be in this situation going in.
Comfort is amazing, build quality is also pretty damn good. I suppose for the original $1k asking price, it's a lot of plastic, but it's some of the nicest plastic you can use, so I have no problem with it. Have to get a headphone stand next as well. My cable has some kinks in it from being packaged, but has enough weight that you can lay it straight and it's fine. Not having any problems with it at the moment at least. FYI, using a Grado 1/4 -to- 1/8 adapter, very well-made, I'm sure it's not affecting the sound in any material way.
Overall, despite my worries about bass, I can tell that with a proper amp, they'll be outstanding and will have more bass than anybody could need. I'd say overall I made a great decision with this.