Instruct: Classify the given Amazon review as either positive or negative.
Query: Good operation for 1.5years

Sprinkler worked great for 1 1/2 years and then stopped rotating. Lubricated to no avail. Tightened spring just a bit and it made no difference. Disappointed in duration as I grew up with pulsators on farm irrigation that worked for 5-6 years without a hitch.