I found them more than responsive enough, but that's for me. Also comfort, they are like riding in air. I really can't tell that they are there. Its like my boots are part of my board. I much prefer them over that capos.
Interesting, I'm looking at both these bindings right now and tempted by the DMCC but worried they won't be responsive enough for the likes of the highlife. I was thinking the SF45 would have been the more obvious option from flux.
What boots do you wear with the DMCC? I also heard with reduced footprint boots the fit with the flux can seem a little loose at the sides...they look awesome though. I'd buy them from dogfunk and if they didn't work out they'll take them back anytime.