Instruct: Classify Amazon reviews into positive or negative sentiment
Query: just the opposite

I purchased the Burpee electronic soil tester and no matter what soil I tested the needle basically stayed at 7. Next,I did a controlled test with vinegar and the needle went to the far left indicating extreme alkalinity! Washed off probes and ran soil tests again and needle stays at 7. I tested same vinegar with a ph test strip and it meas. <5 which is the lowest reading the strip is capable of. Obviously this Burpee tester is useless.