In the Prahalada Charitam of Bhagavatham, Sri Narasimha Swami said to Prahaladha  ͞Whoever learns about Narasimha Avathara and Prahalada charitra, will not have rebirth". The first four Dasa avatars are completely different from the last six.  The first four Avatars came by themselves, by their own will, while in the later 6 Avatars, Lord Srimanarayana took birth like an ordinary human being. Among the first four Avatars, the fourth, Narasimha Avataram is very special as it has Universal Tatvam. 

Sri Narasimha Swamy loves his devotees a lot. This vratam was specified by the Lord himself. It is very easy to perform. Any kind of difficulties can be overcome after performing this vratam. Lord knows all the difficulties and limitations of his devotees, the mere mortals of this Kaliyuga. That is the reason, He has shown us an easy way to please Him and seek His blessings. 
Sri Narasimha Swamy will bless all those who perform this Vratam, eat the prasadam, or read or listen to the stories with devotion. They will overcome all their difficulties.