Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not what I expected

Excellent shipping time. Product did arrive in sealed new packaging, works very well. Great pricing too!However, I was unaware of the fact that the product came with a very large protruding nondetachable piece of plastic on the back of the case. I mistakenly assumed that the back would be flat. The product came with 4 pieces not 2. The Front case, Back Case, a belt clip attachment, and some other attachment I could not figure out how to use. The product came with no instructions on how to use the case and I cut the skin underneath my thumbnail which was very painful trying to figure out how to attach and detach the unexpected items it came with.I am satisfied with the seller. but more detail about the product would have been appreciated greatly.