Hey I'm wondering if anyone has seen a Haven in person or has tried on in a hammock?

It's a backless 700-fill sleeping bag with an enclosed footbox rated for 20°. It's on close out at REI for $169 which is 1/3 less than the JRB Sierra Snivelers that is really like to buy for me and my son. Influencing the decision is an REI giftcard I received over the holidays and the upcoming rebate check making this a very affordable option.

Any thoughts?