Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great idea but

I bought this so I could use the adapter to carry my wifes bike on our new Allen rack. MY complaint is the finish work on it. Upon grabbing it from the packaging, there was a very sharp burr on a rivet that sliced my finger wide open. I contacted Amazon and was told someone would contact me, that was a week ago, no contact. It is something that be fixed with a file but I got blood all over my suit as I was heading to work