Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Seems to work just fine

I have nothing to compare them to, but I bought 3 of these and they seem to do the job they are intended to do. I was surprised to see no savings on shipping when I ordered 3 vs ordering 1 at a time, although I am now clear on the policy. They still were a bargain, as far as I have compared. I would buy again, from the same vendor.