After reading a few of the reviews here, it seems that there are two types of DGN1000 - the ones that work and the ones that don't. Unfortunately they aren't labelled that way, and it's just pot luck which one you get.
Having owned a DGN1000 for around 6 months, its connection reliability has been nothing short of appalling. I am now about to buy something else, and return the unit to Netgear as 'unfit for purpose'.
In short, it was simple enough to set up, but just cannot hold a signal for longer than a few hours of use. Some days I have to reboot it four or five times. Occasionally that's four or five times in an hour! I ended up on the phone with Netgear Support, whose response was along the lines of 'yeah, we're getting a lot of trouble with that one and we don't know how to fix it. We can try a few things and hope that they might work.' Well, nothing worked, it's as bad as ever...
Unless you're a habitual gambler, I would strongly recommend that you look for a more reliable unit.