I would get the super pro set then the training ball and measles ball separate.
The training ball is great for learning to hit higher or lower for more follow or draw. Set the ball up exactly level, then hit the different numbers on the ball higher or lower and see how far the ball goes forwards or backwards after the shot (Using the same speed of stroke and follow through.)
The measles ball is great for seeing what the cue ball is doing. Is it rolling backwards? Does it roll backwards, then slide, then begin a forward roll? Is it spinning left/right? Etc. You can easily see what the cue ball is doing at the far end of the table. And since you can see what it is doing, you can also see if it is doing what you intended.