Item arrived in good time. Planning 3000 mi. trip. Will be put to the test. Have used it as recommended in instructions and worked fine. Fan very quiet, nice fit behind seat, filled with 24 cans of pop that had been refriged and they stayed cold after 2hr. drive, and still cold in morning after sitting overnight with power off. I give this cooler a A+ on function, have not tried the heat mode yet, maybe next winter.