Abu Hatim al-Razi: More pious and a better memorizer than Abu Khalid al-Ahmar
Abu Dawud al-Sijistani: Hafs in his last days suffered from forgetfulness, but he used to memorize
Abu Zar'a al-Razi: His memorization deteriorated after he became a judge. What was written from his book is sound, otherwise it is as is
Ahmad ibn Hanbal: He used to make mistakes (in narration)
Ahmad ibn Shu'ayb al-Nasa'i: Trustworthy
Ahmad ibn Salih al-Jili: Trustworthy, reliable, jurist. And once: Upright, jurist of the body
Ibn Hajar al-'Asqalani: Trustworthy jurist, his memorization changed a little in the end. Once: The leading scholars have unanimously agreed on his trustworthiness and on accepting his narrations, except that in the end his memorization deteriorated, so whoever heard from his book is more accurate than whoever heard from his memorization
Al-Daraqutni: Trustworthy, his additions are acceptable. And once he said: Upright
Dawud ibn Rashid al-Khuwarizmi: Hafs ibn Ghiyath makes many mistakes
Abd al-Rahman ibn Yusuf ibn Khurash: Trustworthy
Ali ibn al-Madini: His book is sound
Muhammad ibn Sa'd Kathib al-Waqidi: Trustworthy, reliable, narrates many hadiths, makes mistakes (in narration)
Muhammad ibn Abd Allah ibn Numayr: He was more knowledgeable in hadith than Ibn Idris
Muhammad ibn 'Ammar al-Mawsili: He was very difficult in hadith
Wakee' ibn al-Jarrah: He would sometimes be asked about something and say: Go to our judge and ask him
Yahya ibn Sa'id al-Qattan: The most trustworthy of al-A'mash's companions is Hafs ibn Ghiyath. And once: His book is sound
Yahya ibn Ma'in: Trustworthy. And once: He is more upright than Abd al-Wahid ibn Ziyad, and than Ibn Idris
Ya'qub ibn Shaybah al-Sudosi: Trustworthy, upright if he narrates from his book, and his memorization is somewhat cautious