Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Be Warned: Will Not Work With Digital Phone Line

My grandparents and I were thrilled with the prospect of their receiving email messages and pictures without a computer. The thrill was short lived when the HP printer quit working, after transmitting one message. We had techs from the cable company and electronics store come take a look, and it was discovered that the HP Presto Printer will not work with common digital cable phone lines. When I called Presto they confirmed that the machine will not, in fact, work with a digital phone line. This REALLY should be stated in the product's description. Disappointing.