Taken as a whole, the story is most excellent. But this tale comes split into two parts, and the second volume is weaker. This is primarily because of the pacing and the missed stories. There are tastes of the missing adventures in the editorials between chapters, but if you want a full story of Scrooge's life, you have to look in other comics. It's especially apparent in the return to Scotland chapter when his sisters find the lock of hair from the girl in the Yukon--a girl that we didn't ever get to really see in this story. We're just sort of told that something went down, but for reasons of space, we don't see it.
And it keeps going on from there. Rather than telling small stories, we start having to tell decades at a time. It weakens the story a bit, makes it harder to track Scrooge's development--which frankly is less interesting after he gets rich. The plucky, luckless fella trying to make it rich is much more compelling than the one that already is rich, especially since the adventures he has are told at blitz speed from then on.
There are still excellent moments (the last page of his parents in Scotland especially comes to mind!), and I still laughed a lot and had a marvelous time looking at the art and meeting more familiar faces as the years came closer to the present, but take this volume as a single item and it's much, much weaker than the first. As a cumulative whole, it's deeply enjoyable, but it just scratches the surface of the Duckverse--which never really took off in America, so getting my hands on other stories easily seems tricky.