Got this after doing a bit of research, reading reviews here, YT review videos.Lots of people raving about this. Not quite so sold myself.I tried different amounts and it's nice (scent is good), but not worth the hefty price tag if you're planning on using it a lot. Maybe just for towels / bed sheets?I add this in addition to regular laundry detergent as this stuff is not viscous and obviously can't contain much detergent or enzymes for actual clothes cleaning.You have to add at least 2oz to every wash to smell anything after a tumble dry:2oz is faint smell, but it persists for at least a week. You can smell it on towels in use over the week.3oz makes things smell noticebly after a tumble dry and then smell for quite some time (days-few weeks).They recommend 3oz per wash, but you'll get through it very fast on that basis.