Protinex is a good place to start if you are looking to take a protein supplement but it is not the best out there. there are 2 types of supplements normal protein supplement and isolate . the differrence is just the amount and quality of protein your body gets. there are many big reputable brands which you must consider if you are a serious body builder like ON, dymatize, and bsn syntha etc
but there are many reasons to consider protinex first of all it is cheap to try out and it contains a combination of proteins and not only whey proteins as you can have allergies to whey proteins.
flavor: it comes in different flavors as elaichi, chocolate, vanilla etc which makes it enjoyable to drink but the quality of flavoring cannot match big players in the field.
packaging: packaging is good, no problems in that area but it could have been better if they would have given a plastic container with lid which can be closed too.
final verdict: if you are serious about body building then protinex is definitely a no no. if you think it is cheaper as compared to other brands then let me tell you it is way expensive than other brands as the amount of protein you get is very very very low and the quality is also not good. so dont waste your money on this one instead go for a whey protein