I got these headphones yesterday, the Classics Walnut Gold. I think I'll be returning them.
The biggest issue for me is the comfort. They aren't terrible and they can definitely do 3-4 hour sessions, but I need headphones that I can literally wear all day long and it's just not possible for me with these guys. Even under ideal circumstances (moderate temperature, cool dry air circulating in the room) they start to be quite the bother after a while. I don't think this is a slight on the headphones necessarily, after all, expecting endless comfort isn't really fair. It just depends on what your needs are. Still, even on the very affordable HD569/598CS, Sennheiser put some lovely microsuede pads and I wish Meze had done something similar here.
In terms of sound they are okay. They have a bit of that tinny, honky closed back sound that I also heard on the HD569 and in that way they don't compete with the DT770. It's not nearly as bad as on the HD569 though and you get used to it after a while, but my first impression was an immediate - and I'll put it bluntly - whoah, these don't sound as good as my other headphones. They're also too bassy in my opinion. Now I love bass, for instance my fav headphones are the Fidelio X1's and X2's, and I EQ my DT770's for bass. But the Mezes are next level. Their bass is overbearing and rather lacking in texture and definition. So already I have a comfort issue, a tonal balance issue, a sound quality issue; I'm thinking EQ just isn't gonna be enough to make me like these guys. I also think 300 bucks is too pricey for what you get, although the product is admittedly very nicely packaged and accessorized. Actually, at this price point this is probably one of the most under-performing headphones from a pure sound quality standpoint that I have heard. But I say this WITHOUT wanting to say that they sound bad. They don't sound bad and they can be enjoyed in plenty of cases. For me it's a matter of comparison though - I'm thinking of other headphones that I own or that are out there and then I see the price/performance of the Mezes and I'm just not seeing the appeal. However, there's some things I like about these headphones: they are really dynamic, it actually took me by surprise. I was also impressed with how electric guitars sounded: very powerful and lively with good detail but not too aggressive, they bring that crunch that you want to hear. Treble is actually good - quite smooth and clean.
I think if you are interested in these headphones you will have to be prepared to try out different sorts of pads and that's just not for me. All in all they haven't convinced me to keep them, but perhaps if you are willing to EQ or try out other pads you can get them to sound nicely balanced. Or maybe you just like them as they come, to each their own ofcourse.