Abu Ahmad ibn Adi al-Jurjani: He narrates two or three hadiths, then he came later with things saying Yahya al-Qattan only means, and Allah knows best, interrupted hadiths. As for the Musnad, I have not seen anything from him.
Abu Hatim al-Razi: A sheikh who writes his hadith but is not strong in hadith.
Abu Hatim ibn Habban al-Busti: He was one of the worshippers of the people of Basra.
Abu Dawud al-Sijistani: Trustworthy.
Abu Zur`a al-Razi: He is fine.
Ahmad ibn Hanbal: Trustworthy, a righteous man.
Ahmad ibn Shu`ayb al-Nasa'i: He is not strong.
Ibn Hajar al-`Asqalani: Truthful, there is leniency in him.
Al-Dhahabi: People considered him trustworthy and Ibn al-Qattan weakened him.
Abd al-Rahman ibn Mahdi: Reliable.
Ali ibn al-Madini: He was weak among our companions.
Authors of Tahrir Taqrib al-Tahdhib: Saduq (truthful) Hasan al-Hadith, and he is closer to being trustworthy.
Yahya ibn Sa`id al-Qattan: He was a confused sheikh, he is fine, but as for the hadith, no.
Yahya ibn Ma`in: He weakens, and once: Trustworthy.