Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Great!

The day of my missed period, I tried another test, it came up negative, so i tried another of this other brand over the next 3 days, all negative. I decided to take one of these and it came up positive. I found out from my doctor, that I had ovulated a 8 days later than I thought I had, so when I had taken this test, it was 4 days before my expected period really, so this test was EXCELLENT!! DUE IN JANUARY!