Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great ... once we figured out how to make it work.

We were really frustrated for a few days after the jar sealer lids were delivered because our brand new foodsaver wasn't able to seal jars with them. We tried over ... and over ... and over without success. Frustrated I went to the foodsaver website and started digging around for an customer service number to contact. As I was looking for the number I came across and read the FAQ section of their site which suggested using two lids at the same time as a solution to problems like ours. You put the first lid on the normal way ... and then put the second lid on upside down (so the two lids don't end up stuck together afterwards) before placing the jar sealer attachment over them and running the machine. We were very pleased to find that this worked beautifully for us. We've really enjoyed the product since learning that tip. It has been very convenient for storing nuts and other dry foods!