this cable modem work immediately out of the box , set up simply and start work right away . I use Comcast . no problem to set up . once set up , if you be nearby this thing be perfect . Wireless be fast , wire connection be fast , all be well . in the next room there be a new Mac desktop , about 35 foot away from the zoom and one wall . it barely pick up the signal . if you have a home or anything you need a real wireless signal for , pick something else . if you want a great modem that will be place exacty where most of you equipment be -lrb- e.g. behind the tv with multiple thing connect -rrb- , then it be perfect . I would still buy this , if for nothing else than the price for a good modem and a good router in one piece .