Instruct: Classify a given review as either positive or negative.
Query: Initial OralB purchase

The first two replacement heads exploded at the back of the plastic head and a little metal pin dislodged in my mouth while I was brushing. Yesterday (12/15/08,) I spoke to a rep. at Amazon.com and they were going to contact the manufacturer and get a replacement pack shipped to me. They said they have not experienced this problem before. As long as the second shipment is fine, I'm okay with this purchase. I do appreciate the personal phone call from the Amazon.com tech.Rick Brandt