Basically I unpacked it, plugged in Ethernet and power cables, it fetched an IP address from DHCP and displayed it on the small LCD. You can do some basic configuration through this LCD/few-button interface, but it's not worth the trouble; just note the IP address, enter it into a browser, and setup from there.
You can't setup the wireless via the LCD interface (unless you make use of this silly PIN code system which my router doesn't support anyway.)
Everything is configurable over the web interface, and by default mostly everything is enabled and unsecured. I disabled features I wouldn't use, configured the wireless, assigned a static IP, and secured the interface with a password.
Note that while you can configure the wireless it won't actually become active until the Ethernet cable is disconnected. You can't use both interfaces (Ethernet and WiFi) at the same time.
Everything went very smoothly and you don't need any proprietary software, even for setup, which is wonderful. :-)
Complaints thus far, although I haven't had the chance to use it much due to only having a few sheets of blank paper lying around, are as follows:
- No duplex printing, although you can of course manually duplex your documents by printing even/odd pages in separate jobs.
- Paper tray is a bit small: 150 sheets. It would be nice to have a 500 sheet tray which would accomidate an entire ream of paper.