Concept of saddle is a good idea but there's been lots on here about them, good and bad. Flair does not suit all horses and good WOW fitters seem a bit thin on the ground in certain areas plus they seem to need more adjusting than conventional flocking.
First Thought consider their fitters their customers not the person buying the saddle so, if you were to encounter a problem with the saddle/fitter it might not be so easy to sort out?
I did have one but sold it for the reasons I've said.