While this product is no longer available, we have reviews of many carabiners that are right here.
The Doval is a new take on the old-school oval design that incorporates lightweight with practicality. It is 40 percent lighter than most ovals out there due to the wire gate. Yes you can still use it typical oval tasks like carabiner brake rappel and opposite and opposed top rope anchors. I first saw these on Ammon McNeely's rack (Ammon is the most prolific Yosemite wall climber of the last decade). He likes 'em because they are very useful on wall but a fraction of the weight of ovals.
Overall, if you are a big oval fan, you may want to stay with a typical oval like the Black Diamond Oval or the lighter Black Diamond Oval Wire. Standard ovals are cheaper, smoother, and you can rack more stuff on them. That said, we like light gear so we wouldn't really consider buying ovals today. So for us, it comes down to do we like this more than other light biners like the Wild Country Astro or Trango Superfly. Here it comes down to how much you like the oval or Doval shape. Overall, we find the Doval not as practical as other light biners and would probably lean more toward an ultra light. But those are our leanings, if you like the oval shape and like light gear, this is a great bet.