Thanks, Lars. The problem with using the slotted holes on the back of the device is one that many other devices have: you've got to get the screws in EXACTLY the right position or it is virtually impossible to attach the router. And once it's on, getting it off can be a bit of a struggle.
Some manufacturers provide a paper template for locating the screws. Some even provide screws.
In any case, the ability to simply snap the router off the mounting plate to plug in cables, work the touchscreen, etc., is appreciated.