I think the 'good' in 'good life' is different to the 'good' in 'good and evil'.
My understanding is that Adam and Eve had no concept of morality, so if you're asking whether Adam and Eve lived a moral life before the apple was eaten, the mythology says that they did and that Evil was not part of man before this act. If you're asking whether their life was 'good' and meaning 'were they content', then probably. Presumably they understood comfort before they understood Evil.
Okay, so God makes humans. He makes them from primate stock, because apparently cats had too much attention span. He then puts a GREAT BIG TREE in the middle of their yard, and says they can have ANYTHING THEY WANT except for apples from THAT TREE. Which, to a monkey, is a big neon sign saying "COME FUCK WITH ME".
Meanwhile, Lucifer gets tossed out of heaven for rebelling. He rebelled because he was told to bow before man because man was superior on account of having free will. So he rebelled. Without free will.
Is this starting to smell like a set up? Anyway.
Lucifer, in the guise of a snake, gets Adam and Eve to eat one of the verboten apples. Adam - who has free will - is talked into this by the snake, with Eve's support. But now Eve is to blame, because in the male-centric view of the Abrahamic religions, Eve somehow is responsible for the obstensibly superior Adam's poor decision-making skills.
God pitches a fit, throws Adam & Eve out of the garden, and sets some really scary angels to guard the entrance so they can't go back. Lucifer gets tossed back into hell, and the poor fucking snake, who was POSSESSED at the time of the incident, loses its legs forever (so long dinosaurs!) and gets to crawl around on its belly.
God is satisfied by all of this for a few generations, then drowns everyone in a big flood, and we go back to inbreeding.