Never have used DD but used Ever Calm last year for the first time. Naturally must of us set up down wind of our expected target zone but on two separate occasions last year I had a doe and a racked buck move in behind me down wind. I ended up shooting the doe. Based on her body language I think she smelt me and the Ever Calm but didn't bust off enabling me to get the shot off. On another hunt the buck worked his way past me and then got down wind. He too, acted as if he could smell both me and the Ever Calm. He stood there, took a few steps looked back my way, and repeated until he was out of sight. Could have killed him if he was what I was looking for.