Flavor and solubility:
There is still room for improvement. Solubility is still not optimal, even a little lumpy. Do you have to stop stirring more. Taste is good (prefer chocolate) and I am its not tired even after long use.
Packing:
Here a lot of air is still supplied. Would be good either to shrink the can or something just to increase the filling amount.
Effect:
Will be perceived subjectively them. For me as a typical desk man with normal BMI who wants to stay in shape (weight training according to plan at home and ergometers), the effect is really good. I notice a greater recovery and a higher load capacity of the muscles. Miracles are not expected and without parent training does is equal nothing.
Conclusion:
Is a good alternative to price-intensive products. Is precisely the question what and how intensely you train and how the body can really exploit certain higher quality ingredients well. Personally, I've been using it for some time and would recommend it.