Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: disappointed

I have a small pond in the backyard and thought this was perfect. I unpacked it and went to plug it in--and no plug. It has 2 little prongs like a grounding wire, and the instructions say put it in the "power pack"-I did not have a clue what to do so I returned it. Maybe I am just not Pond savvy but to keep others from being disappointed I thought I would share my experience.