I've been really pleased with my Jarbridge. I had it down to 37 one night. It was SUPER windy, and every now and then, it'd steal the warmth from the UQ, but it warmed right back up super quick. I did that hang with lightweight long underwear and a lightweight fleece.
I took advantage of the HG black friday sale, so I'm interested to see how it compares to down. One thing that's always bugged me about the Jarbridge is how hard it is to compress. Nonetheless, it's an incredible value. I was planning on selling it to fund my HG Phoenix, but I think I'll just hang on to it. I'm sure I'll end up loaning it to someone I drag on one of my forced marches.