Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Worked for sometime - no longer usable

The product worked for sometime and suddenly I see some holes on the polyester and it is completely useless. The polyester material is not of high quality. I am sure that I havent misused it and it was well kept/maintained. I havent used the umbrella that much and the lifetime warranty considering the shipping and wait times is a waste of time.Looking for another umbrella any suggestions?