The Black Diamond Zodiac Gear Sling is the lightest and least expensive big wall gear sling on the market. It has contoured shoulder straps that distribute weight well. The front of the gear sling has a buckle that goes on and off easily. The downside is that this does not feel very burly for a big wall sling. The gear loops are attached with small bar tacks and the clip in-points at the top don't inspire confidence if you are hanging your you entire big wall rack from the anchor.
If you are on a budget, just dabbling in aid climbing, or only plan to climb a few Grade V clean aid routes, this gear sling gets the job done. We do like how light, simple, and inexpensive it is. However, the fact that it doesn't feel that bomber and only has one gear loop on each side limits how much gear we could load it up with. For serious big wall climbers we recommend the Yates Big Wall Rack and if you want a more burly sling without spending much, get the Fish Double Gear Sling.