Gluten-Free, Casien-Free

Has anyone done a gluten-free casein-free diet? And if so, did you see results with your kids? A therapist suggested it to me, but I'm hesitant to go all out. I can easily replace other grains with the wheat and I've started to do that more often anyway...but the dairy. I'm not sure I can commit to taking that out of her diet.

Any experience with this would be helpful.