first i would like to say that there is really nothing new in bodybuilding and powerlifting all the methods written in books or on the net are personal experiences of experienced lifters...any experienced lifter can make up a routine or a method for lifting...all the approaches in bb and power lifting have been used for decades they just invent new names for them. The good thing is that it can give you new ideas and motivation.
i personally use lots of variation in my training approach just to keep myself motivated.
it also depends on what you want: strength , looks etc..
i went and read some of the cube method suggested by brandon lilly and this is not a good bodybuilding method it is intended for powerlifting and although it can be confusing the way it is explained i think what he meant is that you just train 4 times a week one day for squat , another day for deads and another for bench, and a fourth day as a general bodybuilding workout.
however you just go heavy for only one type of lift each week. one week you go heavy on squats the next you go heavy on deads and the next week you go heavy on bench. which means that you go heavy only one day a week and for a particular lift.