Well, they're in. Isolation is better than the ES10 by quite a margin. The pads are on-ear, not circumaural ala the ESW9 pads on the ES10. My ears are tiny and these pads sit ON them, not around them. But, it is a comfortable fit.
Soundwise: wider than ES10 is, and slightly deeper soundstage, but I've not spend enough time with them yet to say so definitively. Very similar sound style, but less energetic, slight speed hump in lower midrange. Overall, very nice, mature sounding headphones.
As for build: worse than ES10, which apart from horrible earpads, had good overall polish. The ESW11 has awkward seems and joins; the wood is thinly enamelled; paint brush marks are visible, rubber grommets break the continuity of the wood housings.
The cables and harness are the same used in the ES10, which I feel is fine. At first, I wasn't keen on the ES10's design, but after two years with them, I'm fine with them, though they are form over functional quality. These are no DT770 and will break with rough usage.
The 700$ question: I don't know how to answer yet. Damn fine sounding headphones that look, and function, like 400-500$ portable headphones. I know I'll love them eventually, but first sights do not really put the ESW11LTD in good light.