In my experience, the primary benefit from a regular chanting practice is improved mental health. Mantra translates as “instrument of the mind” and the wonderful thing about reciting mantras is that it creates a vibrational space between our thoughts. This is similar to being able to focus on vast expansions of sky between the clouds.
Yogic masters throughout the ages have told us that the purpose of yoga is to ‘know the Self’ (the light of consciousness that radiates within). In truth, the sages say that the Self is already attained and when we turn deep within, we experience our true nature which is blissful and free.