IP Geolocation might never be the silver bullet for determining user location. Like I've mentioned before if it can't pin you exactly it'll give your co-ordinates as being at the center of the population. Use it where you're okay with having a general idea of your user's location or as a fallback where other means of geolocation are not available eg. via browser, or GPS via mobile apps

Indeed. Certainly most useful for getting a ballpark idea of where, in general, your users are located. I would guess anything that really depends on knowing an individual user's location oughta use something more specific. But you could, say, put certain countries or languages as the default of a drop-down based on IP and be right and bunch of the time, while still allowing the user to make a different choice easily.

Got mine pretty close.