Though the cable is thinner and flexible, it doesn't feel flimsy at all (to me). It also comes with an audio-only cable, with no remote/mic. (I don't have that cable with me right now, but I think it's the same as the other one, in terms of thickness and flexibility.) I prefer a thinner, more flexible cable when I'm on the go, and I'd prefer a cable this thin and flexible for, say, the Amperior (which has a pretty thick cable).
And the cable is detachable. I uploaded a photo I just took to the gallery to show the cable detached. (Sorry I didn't include a cable-detached photo in the set in the first place.) When the cable is inserted, it definitely does not look like it would detach because the plug seats quite deep in the cup, leaving just enough of the plug body sticking out to look more like a typical strain relief on a captive cable. Here's the photo:
I think I'll be posting first impressions of this headphone today or tomorrow, but I really like it. It's not what I'd call a reference headphone, per se, but it's very well executed for what it is (in my opinion).
Wow...they look really nice, but the price might not be for me.