Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Provides nighttime relief

I have trouble staying asleep. I take melatonin every night. It works 90% of the time. And there is no residual sleepy feeling in the morning. I find that sometimes I do better with 1 mg and sometimes I do better with 2 mg. The 1 mg tablets allow me to fluctuate between the two.