Only use once or twice a week on nights when thoughts are racing yet sleep is still needed. Quality rest has been poor for the last few years. At 250-300 mcg it appears to improve sleep without next-day grogginess, whether placebo or not. The wired-but-tired state eases, especially ahead of early travel. Unlike other aids, waking after a few hours leaves me clear-headed instead of sluggish. Last night six hours felt like eight and I was alert right away.
.3 mg DSIP is a reasonable place to begin. Hope the numbers turn around; reduced deep sleep isn't something reported often.