Steven made a video about GeoSense for a web site called ShowMeDo.com. This program is an online geographical quiz that runs in your browser and lets you challenge other players. What they said about it is "Warning: abuse may cause addiction."
Not sure what that means.
Matt had this to say about GeoSense
What surprised me most about GeoSense was the improvement I noticed within only a couple of hours. I have probably spent several hundred hours in my life looking at maps, so it would seem that an additional couple of hours would have a negligible effect on my knowledge of geography. But something about the game's instant feedback, or the scoring, however, focused my attention on remembering where the cities were in a way my map reading had not.
When I started, I was pleased when my score was over 4500, and within only a couple of hours, a score over 6000 was routine and below 5400 rare. (My top score was 6308, and my lowest 'error rate ' -- the average distance from the city -- was 52 kilometers.) These scores show up in the High Scores under my login id of coldsquid.
If you are looking for a productive waste of time, check out Geosense.