Abu Ahmad ibn Adi al-Jurjani: Generally, what he narrates is not corroborated.
Abu Hatim ibn Habban al-Busti: Among those whose memory deteriorated and whose mistakes increased, to the point that he contradicted established narrations from trustworthy narrators. When this became frequent in his narrations, his use as a source became invalid.
Abu Muawiya al-Darir: Write from him.
Ahmad ibn Hanbal: How close his hadith is!
Ahmad ibn Shuayb al-Nasa'i: He is not strong.
Ahmad ibn Salih al-Jili: Trustworthy, but he had some Shia tendencies.
Ibrahim ibn Yaqub al-Jawzajani: Weak
Ibn Hajar al-Asqalani: Truthful, but he makes mistakes and was accused of Shia tendencies.
Muhammad ibn Isma'il al-Bukhari: Rejector of hadith
Muslim ibn al-Qasim al-Andalusi: He is alright, but there is weakness in him.
Authors of Tahrir Taqrib al-Tahdhib: Weak, but he can be considered in corroborations and supporting evidences.
Yahya ibn Ma'in: He is nothing. And once: Do not write his hadith. And once: Weak