I got to take my Ridgerunner, Cloudburst, and Lynx underquilt out for two nights on a Boy Scout campout this past weekend. I am very happy with this setup and am glad I purchased it.
The top quilt is an Enlightened Equipment Revelation X. It's the 20 degree model with 30% overstuff. Temps were only down to around 40, and I was toasty warm. Even though I'm happy with this quilt, I wish WB made a regular length WIDE Mamba TQ. I would be really tempted to buy one as I am very impressed with the weight and construction of the Lynx UQ.