I used a hole saw and a hand drill. It was fairly easy, and I think you would have to be on crack or really not pay attention to what your doing to not get it right.
If you have the center of the holes marked well, hole saws have a pilot bit on them that is very easy to align, I was able to consistantly drill perfect holes that the buttons and sticks fit through every time. now keep in mind I am not a mechanical person, and have no measureable wood working skills or knowledge, a friend from work told me this very same thing...low and behold, he was right, if I can can make every hole nice and perfect with it anyone can...trust me.