Most important thing is that the device is on your ISP supported list. Most arris products are supported by most ISP but if it is not on their list they will not activate it for you.
I suspect you typo the model but that is device is what is used by many cable systems that deliver more than 100mbps. It is kinda overkill if you isp does not use the extra capacity, but other than costing more money it does not hurt anything to put it on a slower connection.