Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Time consuming

It took calls to Bell customer service, who said that an older bike couldn't use the trainer without a quick release back tire, to find out that they really didn't know what they were talking about.When I was ready to return the trainer, a neighbor who knows about bikes came by and put it on for me. I was shocked that it worked after Bell customer service suggesting I return it.