what I have found is that the key is to use the right scent at the right time. By that I mean don't put out estrus scent 2 months before the rut. I've done this before and actually spooked the deer.when it comes to brands I'm sure everyone has one that they prefer, but I think most will do the same as others. I personally don't like to use cover scents, I'd rather they didn't smell anything.