Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Poor quality and lack of customer service

I bought one after seeing a friends. Mine was very hard to spin up. Had to use a string pull to get it started. Then it started getting harder to keep going. Contacted dynaflex about replacement, service, advice etc. All I got was you must have abused, dropped etc. Very poor communication style with all caps and misspelled words on top of accusations I was responsible for the loss in performance.I enjoyed using it the 30 - to 40 times I could keep it going.A friends powerball pro with no lights is much easier to spin up and has been working for hundreds of spins. Maybe I got a lemon but the customer service experience was bad.