A good intro into the Christian orthodox theology and doctrine. Simple, clear, concise, with accompanied verses; although at times it could be quite repetitive to reach a point across. All in all I enjoyed learning the new terminology presented for some theological concepts, in English, and could use it as a bases for more complicated theological reads.
I totally recommend reading this first if you’re just like me, a foreign to english theological terms, and want to read more deeper books written by the old fathers.