That was exactly my approach to it. I fully expected to have to send it back.
What I did find was that trying to set it up beforehand (on IDNet) failed miserably. As a result I had to do a factory reset, then clicked the wizard, and all it asked for was my ISP username and password. DNS and even the fixed IP address were picked up automatically within seconds.
Huge number of options. One I like is that you can let WEP devices connect as well as your main WPAx ones, and the WEPs only have access to the net, not to the LAN.