Works, Smells bad and doesn't taste great
I have only tried this as a hot tea so far and I have not yet experimented with adding anything to make it taste better.  If you smell the powder it isn't exactly a pleasant smell.  Fortunately the taste isn't as bad as the smell, but I found it to be slightly bitter.  However, if definitely did help me get to sleep quickly.  Actually, I found it difficult to try to stay up after drinking this.  But this is quite expensive, essentially costing you $2/night.
Rating: 4 stars