Fuzzie, I used mine @ the Caddo lake hang couple weeks ago, temps in 20's and 30's and it performed great as I'm sure yours' did. I checked several times during the 4 nights and there was consistently a 10 to 12 degrees difference inside. Mine is a double 11ft model, it really is as comfortable as the WL night owl, your right the zipper system is truly ingenious, haven't really used bug net, except to show it, love it as I'm sure you do and the workmanship is exemplar. know you'll enjoy. jim