i usually buy the cheap stuff like knight and halls scent bombs. they have worked in the past for me but not always, especially if the area is pressured hard. first day i ever went out i put out a scent bomb and had a spike sneak up to it only to receive a 16 Gage slug from my grandpas old Remington. i have rattled or called and put out scent. i think it's just one more factor to make the whole act seem more real. i use my special hot sauce on the active/mock scrapes and that really has been the best effect I've gotten out of scent. it seems to keep deer coming back to check the scrapes and keeps them from going other places.