It works for me, and Id like to think a lot of others who drink alcohol, and use kava as a sub.
People usually drink alcohol at night to help sleep also.
So with that in mind;
I find all kava helps with my sleep, different varieties create different effects "More lucid dreams, hard dreamless sleep, etc..etc"
I love the Kavain types, and find that Fu'u creates a "easier" situation to fall asleep and give really great dreams.
BKH instant green is a mild inducer, but gives for a "at ease" feeling with not being able to sleep. Which in return helps you to fall asleep, lol.
Almost like Zazen and feeling content with nothingness.
Yes the diuretic effects make you have to pee, haha
But after you fall asleep initially; when you wake to pee the going BACK to sleep is easier.
Fiji is nice.
The feeling compares to....well melting into the pillow.
I cant come up with a more poetic description, as I wish I could. But it is really great.
Remember, you will live without a night of sleep.
I think that's the best way to think. we get so worked up about FORCING sleep, when sometimes, turns out we don't sleep that night.
No big deal, we are strong.
When you cant sleep, try having some fun with your mind.
Lay still, and do not move at all.
Focus on nothingness, and concentrate on breaths.
Count them.
Either you will fall asleep,
or have some awesome pseudo lucidness/meditation