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Just took a look at http://www.chesscafe.com/mazes/mazesintro.htm to get the idea of chess mazes in general. My first impression is that it would be more beneficial to solve tactics problems available either here on chess.com or on chesstempo. More relevant to the game itself, IMO.
I agree Crazy. I asked the same question to Dan Heisman and he said the Alberston books would help improve "board vision". He also said you get the most benefit from thing you enjoy doing so if your having fun to go ahead and do it. When it becomes not so fun your beneficial return decline