They are fabulous if you are pretty short and a particular kind of female body type- which is what they were designed for. I have stood near Ms Werth and I have probably 5-6" of height and even more inches of inseam on her. I have a long calf and somewhat inwardly rotated hips and I can’t even sit comfortably at the walk in an Isabel in any seat size. The trainer I ride with the most is 11" inches shorter than me and toes out like a ballerina and does like the Isabel saddles.
OP, a not bad idea for looking at saddles is to look for a rider with your body type / height and similar way of sitting and see what they use. Most people my height/inseam ride with an open seat and a forward flap including men. Learning that was very helpful for me in choosing saddles that might fit me.