I've been looking for an ultra-light quilt with synthetic insulation to take with me on climbing trips, and I hoped this might fill the bill.
Pros: It is a warm bag - I slept in it outside at 24 deg F on a guidelight thermarest wearing longjohns and a thin synthetic puffy, and I was plenty warm.
Cons: The bag is heavy and bulky. I won't try to estimate the denier, but the fabric is thick -- might be good for longevity, but it is bad for weight. The insulation is also very stiff and puffy - even with a compression sack it ended up bigger than I wanted to carry. A bit strange as a product design selection, since anyone getting a quilt probably values weight over most other considerations.
I've returned the bag, since it didn't meet my intended use.