I guess without any childhood memories it's hard to say this movie is good.
My only interest in Cloud Atlas is based on seeing a short trailer on TV. I wasn't familiar with the book, heck, I didn't know anything before I started watching.
So after half an hour of thinking Tom Hanks is an immortal with an identity crisis, I googled "Cloud Atlas explanation", finding out a little more about the complex story. I decided to keep watching with an open mind, not being overwhelmed and just fixate on the things I did…