I gave it four stars because this is the best choice, if you want to understand where Hellinger comes from, not because I agree with him that much.
He has some good insights, but nothing revolutionary.
He invented warm water - good. He added some real bullshit - not so good. He was the daredevil who used what he found useful - good again. But then he cmae up with some pseuscientific and pseudo-philosophical explanation about how it works - that's the worst of all.
BTW in my view his method is simply divination. Anthropomancy. :)