I bought the GF-PRO Rasberry Lemonade about a month and a half ago and just finished it. I would not order that flavor again.
Not wanting to judge this product on one flavor, I just picked up the Orange Cream about a week ago and started using it this past weekend. They hit a home run with this flavor, tastes like an Orange Julius with just water, add a little milk and it tastes even better.
Although, I think adding milk to this product would slow down the absorption rate, therefore defeating the purpose of it. I think P.A. said something along these lines on bb.com a while back.