Instruct: Classify Amazon reviews into positive or negative sentiment
Query: poor service

It is unfortunate that the dimensions for this product were not given. It does NOT fit all Canon EOS cameras and certainly didn't fit mine. There was no invoice in the box when it arrived. I called the company (after much research to get a telephone number) to get info to return the lens and was promised a return sticker by mail. That was almost a month ago and I am still waiting.