Abu Hatim al-Razi: Thiqah (reliable), makes many mistakes, and once: Saduq (truthful), makes many mistakes in Hadith
Abu Hatim ibn Hibban al-Busti: He may have made mistakes
Abu Dawud al-Sijistani: He praised him highly and said: However, he makes mistakes
Ahmad ibn Shu'ayb al-Nasa'i: Thiqah (reliable), makes many mistakes
Ishaq ibn Rahawayh: Thiqah (reliable)
Ibn Hajar al-'Asqalani: Saduq (truthful) but with bad memorization
Al-Khatib al-Baghdadi: He narrated from Ishaq ibn Ibrahim al-Hanzali that he is Thiqah (reliable)
Al-Daraqutni: Thiqah (reliable) but makes many mistakes
Al-Dhahabi: It was said that he buried his books and narrated from memory, so he made mistakes
Zakariya ibn Yahya al-Saji: Saduq (truthful) but makes many mistakes, and has some delusions
Sulaiman ibn Harb al-Azdi: It is good to praise him
Abd al-Baqi ibn Qani' al-Baghdadi: Acceptable, makes mistakes
Muhammad ibn Isma'il al-Bukhari: Rejector of Hadith
Muhammad ibn Sa'd Katb al-Waqidi: Thiqah (reliable) but makes many mistakes
Muhammad ibn Nasr al-Marwazi: If he narrates a Hadith alone, it is obligatory to pause and verify it because he had a bad memory and made many mistakes
Authors of Tahrir Taqrib al-Tahdhib: Da'if (weak), but considered in supporting narrations and evidences
Yahya ibn Ma'in: Thiqah (reliable)
Ya'qub ibn Sufyan al-Faswi: A great, old, and righteous Sheikh. Our Sheikhs used to recommend him, except that his Hadith does not resemble the Hadith of his companions. It is obligatory for the people of knowledge to pause regarding his Hadith, as he narrates Munkar (rejected) Hadiths from reliable Sheikhs