I purchase this modem as a new unit without the pretty packaging . it arrive on time and work well for a half a hour or so . then the power supply burn out . after a quick call to Motorola and a repurposing of one of my hard drive power supply the modem be work again . this must be a common problem , as motorolum support suggest this approach as my first intervention . after confirm the supply be bad , they promptly send a new power supply . with a new power supply the modem be very dependable and easy to use . I would buy it again . if yours fail , check the power supply by plug in a similar one from you own collection and call motorolum to get a new one .