One of the biggest benefit that happens, when Namokar mantra is recited with true understanding is development of Bhakti. Now many people don't like something related to Bhakti and most of the times the underlying reason for that is Ego. With rise of Pure Bhakti in us, our ego diminishes slowly to the point of total eradication. Why would this happen is that when someone does Bhakti, like reciting Namokar mantra which is a type of Bhakti, the person has to forgo his choices and conditioning and praise the virtues of someone else. Now it's not really easy for a normal human to praise someone else. When someone bows down, in reverence, to some other person, he actually puts that person's virtues above his own likes, dislikes, ego, attitude, etc. which ultimately destroys ego. Destruction of ego is of utmost importance as it is one big hindrance to any progress one wishes to achieve in life.