Abu Hatim Al-Razi: He narrated ten thousand Hadiths from Hammad ibn Salamah, and ten thousand from Sufyan
Abu Hatim ibn Hibban: He may have made mistakes
Abu Abd Allah Al-Hakim Al-Naysaburi: An Imam, a حافظ (memorizer of Hadith), trustworthy
Ahmad ibn Shuayb Al-Nasa'i: There is nothing wrong with him
Ibrahim ibn Musa Al-Farra': From him we learned Hadith
Ibn Hajar Al-Asqalani: Truthful
Al-Dhahabi: Even if he mixed up twenty Hadiths, considering the vast number he narrated, he would still be considered trustworthy, and once: Trustworthy
Abd Al-Rahman ibn Al-Hakam Al-Zaghba: His book is authentic, good to take from
Authors of Tahrir Taqrib Al-Tahdhib: Trustworthy, and more than one of the Hadith scholars praised him
Wakee' ibn Al-Jarrah: One of the best Hadith scholars, were it not for the fact that he mixed up two Hadiths
Yahya ibn Ma'in: Intelligent, trustworthy