I use Scent-Away as well and have never had any problems with it, not sure how it works but I've had deer downwind of me and not pick me out. Of course other variables come into play, its cheap and seems to work so I'm sold.

As for estrous I use Code-Blue and have used Buck-Wild Flamin Doe only because it is a brand I haven't seen readily available so it is not something that every joe is putting out