Namaste all,
i have found this text to be remarkable and inspiring for my own daily practice. the life of Shantideva is extraordinary even by Tibetan standards of accomplished Lamas.
the entire text was spoken in verse during a religious debate that was designed to get Shantideva expelled from the monestary!
most of the test is quite comprehensible without commentary, in my view, however some sections require certain knowledge which is common amongst the group to whom this teaching was given but not so common outside of it, and it is these sections wherein the commentaries are indispensable.
my favorite of the commentaries is "A Flash of Lightning in The Dark of Night" written by His Holiness the 14th Dalai Lama. i find his explication to be extraordinary.
metta,
~v