This product works as intended. We bought it used and it works great. This is a 3.0 modem that can provide true high-speed Internet access (over 100Mbps). It works well and is CISCO so it's very reliable. My husband makes his living in IT, so he knows all about these things. The prices suck, but he doesn't buy anything but CISCO when it comes to routers and modems. However, reliability is always worth the extra cost. We generally remove products based on ISP demand, not hardware failure. Our last modem was a CISCO, and it would still work if Comcast didn't tell us to get DOCSIS 3.0. This is a great device. I recommend it to anyone who needs a Comcast Business listed cable modem. Overall: 10/10
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