I just received an Ultralight Asym Zip for my partner. It's great! Nice chunky zip. It's been a while since I used the stock Hennessy suspension and it's not such a hassle to tie up as I remember. About the same as a whoopie sling for me.
I called Tom to order the hammock. I thought I was ringing NZ, but turned out I called Canada at some awful hour of the night, nonetheless, he was polite and helpful.
It arrived speedily and we couldn't be more pleased. Definitely worth checking out the new zip models.