Zen Bivy?

[RAM190Hog]

Anyone try one of these Zenbivy's yet?

Backpacking Sleeping Bags, Quilts, Mattresses & Pillows | Zenbivy

Zenbivy Beds combine the warmth of a mummy bag, the versatility of a backpacking quilt, and the comfort of your bed at home.

zenbivy.com

I have an EE 15 degree bag I have used down to about 30F. I am hesitant to use a quilt much below that due to the drafting, but the zenbivy might work due to how it secures to the sheet...

Just wondering if anyone has used one yet and if so, any feedback.

 

[tillastlight_jake]

I just got a 40 deg in their zipper-less model as I was in need for a warmer weather bag. Hard time to test the warmth/drafting since it already staying into the 70s at night here, but I echo those same concerns. My thought might be to sacrifice the weight of a zipper if I jump down to their 25 or 10 deg to make sure everything stays buttoned up. I am impressed with how the bag doesn't roll with me and my pad stays in place, even in mummy mode.