St. Photius saw him as a deeply holy man, but not one without error.
Some, modern, Orthodox theologians dismiss St. Augustine as a heretic.
There is a useful (and concise) text, by George Papademetriou, on the Orthodox (Greek) position vis-?-vis St. Augustine, to be found in the festschrist for Bp of Abydos, Gerasimos of blessed memory, entitled Agape and Diakonia, ed. Chamberas (1998).
It outlines the problems of St. Augustine's (and St Ambrose's) use of the filioque- although NEVER intended as part of the Creed- and how this impacts on Orthodoxy.