When Imam Ibn Majah showed his work to Imam Abu Zar'ah, the latter remarked: 'If this book reached the public, all or most of the existing Jawami would cease to be used. The words of Imam Abu Zar'ah proved be true to the last letter. Several Jawami, Musnads and Sunan were eclipsed by Ibn Majah's Sunan.
Hafiz Ibn Hajar termed the book Jami' Jaiyid (a good, comprehensive Hadith collection).
It is to be noted that this book contains some daif ahadith. Accordingly, the study is recommended to be done under a learned scholar to avoid misguidance. Examples of some weak narrations in this book are as follows: Example 1, Example 2