I tried one on my high withered Arab mare before I bought my cc saddle in July and hated it (she hated it too).
I found that the pommel chafed, the knee rolls were way too big and forced my lower leg and feet too far forward (like one of those antique prints of huntsmen jumping) and the seat seams dug into my seat bones and hurt my bum!
Although it technically fitted my mare, she felt my pain and weird riding position and refused to go forward or went into a shuffling trot (my legs were forced too far forward for me to keep my leg on her).
Yet, when when one of the girls at the stables sat in it, she loved it! It just depends on your body shape and riding style I guess. I would test one first though incase you have the same trouble.