Abu Hatim bin Hibban Al-Busti: He used to make mistakes
Abu Dawud Al-Sijistani: He makes mistakes
Abu Zar'ah Al-Razi: Truthful
Ahmad bin Hanbal: He is fine, except that he hardly ever said in any of his hadiths: He narrated to us, and once: Trustworthy
Ahmad bin Shuayb Al-Nasa'i: He is not strong, Kufi
Ahmad bin Salih Al-Jili: Trustworthy, except that he heard from his father when he was young
Ibn Hajar Al-Asqalani: Truthful, but with some errors, they denied that he heard from his father because of his young age
Al-Dhahabi: In Al-Mizan: Truthful, famous, relied upon in the Sahihayn
Muhammad bin Sa'd, the writer of Al-Waqidi: He has Munkar (rejected) hadiths
Authors of Tahrir Taqrib Al-Tahdhib: Weak, but considered in corroborations and supporting narrations, Al-Bukhari narrated three hadiths from him
Mazhar bin Mudarik Al-Khurasani: His hadith is accepted, and once: He is not anything, and once: He said: Muhammad bin Talha said: I knew my father like a dream, and he narrated authentic hadiths from his father
Yahya bin Ma'in: Weak, and once: Good in hadith, and once: He is not anything, and once: Trustworthy, and once: He is fine, and once: Good, and once: Weak in hadith