It took about five minutes to complete.  There are instructions on the box, as seen in figure two. to help aid in solving the maze.  It fits nicely in the hands, it is a 3.5 inch and 3.5 inch cube.  It rattles a lot when you move it.
The biggest problem with this toy is that the door is incredibly difficult to unlock. The door takes about a minute to open, and must be opened with precision or else the door will lock itself again.