I would buy a Wiggy's bag if I could afford it. What I needed was something that would work in a wide range of temperatures and be small enough for my already overstuffed trunk, and $75 was about the maximum I could afford for that.

My camping is with my small children, so it's car camping and not when very cold. The sleeping bags we use for that are accordingly light. The new sleeping bag is intended to put the finishing touches on my "stuck in a snowbank for three days" kit, which is about the worst survivable thing I think is worth planning for when I'm road-tripping. It's meant as a major improvement over the Heatsheets Emergency Bivvy.