I also just like the zipper so much more now -- it's 7' long and lets me vent a little or a lot or just peek outside. I can turn it (the hammock) away from the wind unlike the top that catches the wind from any angle. It doesn't seem to affect condensation much. The little I get is caught by my breath mask thingie.
I can still step into the inside of the sock for clothes changing or to store stuff in the bottom portion of the sock. The water proof bottom works awesome in the snow - dwr material can still get wet if it contacts snow. I store my boots inside and while they're still cold in the morning, it's not near the cold shock in the morning if I left them outside.