I find that these headphones present what can only be described as a wall of sound. The positioning is good, but they suffer quite a bit from congestion when the going gets complicated, although not as much as my AKG Q460s did.
I suppose they'll do for TV and streaming Internet radio of the "unce unce unce" kind late at night when I don't want to disturb my girlfriend, but I seriously doubt that they'll replace my HD25s as my portables in any way or form.
In the meantime they are back in their box, with my HD25s resuming portable duty. I'll take another listen to them next weekend as I did listen to these directly after a long session with my AKG Q701s, which may well have skewed my initial impressions.