Optimum Nutrition After Max?

Can anyone vouch for this supplement? It seems promising: 40 g's of protein 5 g's of creatine and glutamine and a bunch of vitamins and minerals. Can anyone say if this is an effective supplement or not for building lean muscle mass?
 
Any help please? I really want to try out this supplement if I get the okay that its good for a post workout shake.
 
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