Service: The seller promised shipment in 7-9 days. In fact it was 6 weeks before we received the sensors. Most looked to be new in brand new boxes while some appeared to be old stock in shelf worn boxes. We told them this was a rush order and only agreed to place it because they promised fast delivery. Then the delays and no replies to our inquires. When asked when the products would be delivered, they kept claiming that they had been sent, but would not provide tracking details. Later they provided false tracking details and finally, weeks later, actually shipped the sensors, so at least we got them. I would not buy from this company again.