i dont see that as a good data visualization. why you might ask? because it's not self explanatory. while the target bar might be clear, the poor, average and excellent value feature a different style, while containing similar information. also it's not possible to have 2 bars at the same height, which might not be a problem, but the example they are showing has exactly this problem.
That's not the fault of the chart type. It's just a bad execution in that blog post. I.e. the shorter bars should be very light, and feel more like a backgrund for the actual bar.
It doesnt make the graph any clearer in my opinion. the graph uses 3 different styles of value indicators. the background colored areas, the bar itself and the "target indicator".
discarding the "target indicator" and using intuitively understandable colors (red/yellow/green) for the background colors might help, but othervise i dont see this as a easily readable graph style. especially it cannot be read without prior explanation.
If the graph is being used regularely within a company or group it may well be used.
