I just got them this morning! A little bit early than what tracking suggested.
So far, I think I made a great choice. They are much lighter than I was expecting. The ear pads are the perfect size for my ears. Complete around the ear fit. Only issue with the ear pads is so much padding and pleather rests on your head that it gets quite warm pretty quick. It's not a big deal to me though.
As far as any other size or comfortability issues...none! I have the headphones set on the smallest head size setting and it fits like a glove. Very snug and secure fit. Perfect seal around my ears and no play if I move around or bob my head. These aren't falling off my head without a good pull or something. Clamping force is good. Not too tight not too loose. It's a little less than most DJ oriented headphones, so it's not a head crusher by any means.
Now onto something I was worried about and not sure if I would like. The Cord! This is definitely a thicker cord than any other headphone I owned. I was concerned about mobile use both for weight and length. It's a tad more to deal with compared with typical mobile headphones, but I have no problems. The cord length is nice. I actually like the few extra inches. Also the coiled aspect is very nice for my home studio. Basically this cord is a perfect balance for being good for mobile use and studio use. Usually you have to switch out cables if you have detachable ones or deal with a cord that is either too short or too long if you use your headphones for dual purpose like I do. This is nice, I didn't think I would like the cord, but it's a really smart design here, and works for both of my primary needs very well. The coiled part of the cord is extremely springy. These are nice tight coils. I don't see this part of the cord having tangling and other issues that say something like the coiled MDR 7506 cord does. It seems very robust in every aspect. The cord retains a bit of memory from being in the box. Hope that straightens out and becomes more flexible.
Lastly, the sound, I've only been listening to them for about an hour. I like the sound a lot. It definitely sounds pretty neutral. After using the ATHM 50 for years it's going to take a little bit of getting used to. These are definitely more restrained in the highs and bass in comparison. They sound controlled. The M50 sound very uncontrolled in comparison. The mids are comparable to the M 50 to my ears. They are not very forward. I feel like some frequencies in the mids are a bit recessed. I feel like the bass and the highs in the 8.35 D could be a little bit more extended. Not by much though. I also found that the 8.35 D doesn't respond as much to EQ changes as the M50 does. It also did weird things like if I turn up the bass the sound gets distorted and congested very easily but the bass level doesn't really increase too much. Not sure if I would trust these with monitoring bass, or doing much EQ work. I have to look into it more. The distortion might be a good thing for my purposes letting me know when there is just too much bass. It could be that the M 50 is just too sensitive to bass too. Sometimes I make an EQ change while listening to the M 50 while doing a mix and it makes a huge difference on that particular headphone, but on nothing else. EQing mids and highs gets better results.
The soundstage really depended on what I was listening to. Most songs sounded fairly congested in the centre, BUT some songs that had a lot of panning and had a wider stereo field, you could definitely hear where things were in the mix. Some songs surprised me with how far out of centre some sounds were in the mix.
I read a lot of mention of sibilance. I need more time, but I do notice slight sibilance with the stock pads. In most cases I knew the sibilance was there. For instance I listened to Dr Dre's The Chronic remastered on vinyl and yes it was sibilant, but I always found that album to have sibilance, and many vinyl remasters seem to have sibilance these days.
Overall, I really like the sound. some minor gripes. A lot less gripes than I have with most headphones and I have gripes with all of them. lol I need a good long time before I can comment with certainty on how great they are for mixing purposes. I need some time to digest a ton of music with them, and mix a couple of tracks and check out the results.
I may do a more detailed and focused review after some time with direct comparisons with the headphones I already have. These are just my initial thoughts. I literally just took these out of the box a little over an hour ago.
There is one thing out of the ordinary that didn't come in the box, and that's the "Introduction" paper that tells you about the headphones and shows their whole line of headphones. There was just the adapter and the headphones that's it. Everything else looked legit though!