The latest updated version of the Petzl Luna is the heaviest harness that we tested (15 ounces), but it doesn't seem to have more padding than other harnesses in our lineup, nor was it more comfortable to hang in. Petzl recommends this harness for mountaineering and ice climbing, but we found the placement of the ice clippers to be too far to the rear, and there were only two of them. We much preferred the Black Diamond Lotus and Arc'teryx AR-385a with their four ice clipper slots instead. This harness didn't seem to be well suited for trad climbing either, as the rear gear loops are small and out of reach, and the leg loop buckle is painful to chimney on. Really, the Luna is just an adjustable leg loop version of the Petzl Selena and is more suited to sport climbing.
Petzl updated the Luna this year. See the latest version in the photo above and scroll down for the details!
There doesn't seem to be much different in the design of this harness and the men's version (Petzl Adjama), except perhaps a slightly longer rise (the distance between the leg loops and waistbelt) and of course a "girly" color (not that there's anything wrong with that). Ultimately, this harness comes down to a matter of fit. The women that tested this harness that had a short rise and more straight-cut anatomy liked the fit. Those of us with hips and/or who like to wear their harness on their waist did not. If you are looking for an all-around harness with adjustable legs, we'd recommend our Editors' Choice winner, the Camp Supernova.