Consider me another data point for "found no obvious effect". I took a 3mg dose nightly for a couple weeks and didn't notice it doing much of anything. It might have made me feel a bit drowsy, but only briefly, and to a sufficiently small degree that I considered a biased perception due to wondering if I'd feel sleepier to be a more plausible hypothesis.

In either case, it certainly did not produce enough drowsiness to make "going to sleep" seem unusually appealing, and going to bed after taking it remained a conscious, deliberate exercise of will; on at least one occasion "procrastination" won out and I stayed up anyway with no appreciable difficulty.

Nevertheless, intermittent insomnia and restless sleep in recent weeks has convinced me to try again. Current, extremely subjective impressions are that it might be marginally improving sleep quality, but seems to do little for countering insomnia.