Abu Ahmad ibn Adi al-Jurjani: The most knowledgeable person regarding Laith ibn Saad, and he possesses narrations from him that no one else does.
Abu Hatim al-Razi: His hadith is written but not used as evidence, and he understood this matter.
Abu Hatim ibn Habban al-Busti: He mentioned him among the trustworthy narrators.
Abu Ya'la al-Khalili: Trustworthy, and he narrates unique hadiths from Malik.
Ahmad ibn Shu'aib al-Nasa'i: Weak, and once said: He is not trustworthy.
Ibn Hajar al-'Asqalani: Trustworthy regarding narrations from Laith, but there are discussions about his hearing from Malik.
Al-Dhahabi: He was abundant in knowledge, knowledgeable in hadith and the lives of people, insightful in fatwa, truthful in his religion. Abu Hatim was strict with him, and I don't know what al-Nasa'i saw in him to weaken him. Al-Bukhari and Muslim used him as evidence.
Zakariya ibn Yahya al-Saji: Truthful, he narrated a lot from Laith.
Abd al-Baqi ibn Qani' al-Baghdadi: Trustworthy
Muhammad ibn Isma'il al-Bukhari: What he narrated from the people of Hijaz, I consider him reliable.
Muslimah ibn al-Qasim al-Andalusi: He criticized him because his hearing from Malik was only through the presentation of Habib.
Authors of Tahrir Taqrib al-Tahdhib: Trustworthy, and more than one scholar considered him trustworthy. The two Sheikhs (al-Bukhari and Muslim) used him as evidence.
Yahya ibn Ma'in: He is nothing. In a narration by Ibn Mahriz, he said: He cannot even recite the hadith of Ibn Wahb properly, so how can he recite the Muwatta?