I'm not a fan of the Isabells at all. I have short legs, they are made for people with short legs, but upon getting off after riding in one my hips ached. I felt locked in the whole ride, found it extremely difficult to use my seat to the extent that I usually do, and just all round hated it.
If the saddle fits you, your horse and you feel very comfortable in it, by all means go for it. As long as it isn't locking you into a position. If it makes a correct position easier, that's good, if it forces you into a position, bad!