The main problem with almost all the packet milk is taste. Packet milk is never close to the taste of the pure fresh Milk. Nandini packet milk is no exception. Also, packet milk quality is not good enough. I believe almost all packet milk company add some milk powders and other thing to fulfill the growing demand of the Milk.
Like many other dairy company they do not have the facility to check if cow/buffalo is injected before milking. Many milkman put injection fore they milk the cow/buffalo. This injection is very dangerous to human health.
Day by day these dairy company promoting foreign breed of cows, they dont try to improve on Indian breed. These dairy company can launch product which is pure Indian cow milk(NOT the foreign breed). This product may be a bit expensive but will have very good demand.
Still I feel compared to other Private/multinational company products, Nandini is still good.