Okay what to say about another secret origin of comicdom's first superhero? From John Byrne's Man of Steel to Mark Waid's Superman Birthright and Geoff John's Secret Origins, another Superman origin tale seems redundant. But since it's Earth-one, it tells me that DC wants to have a brand new template well sort of.
Doug Zawisza of CBR writes an interesting review: Superman: Earth-One review:
The most interesting aspect of this book for me was Clark’s search for a purpose in the beginning of the book. A small town boy, Clark makes his way to Metropolis to try and figure out what exactly it is that he wants to be when he grows up. When you can be absolutely anything in the world that you want to be, what is it exactly, that you want to be? There are some interesting choices presented here as well as some great insight into why Clark is super even when the cape isn’t on his back
All in all a great choice to buy and read. Well, it's not Smallville so I guess it's another fresh take on the Superman mythos. Enjoy reading.
