Back when I was a chemistry and math student in university, this was the type of movie I dreamed of one day making. A movie which has to balance the science, history and the biography part of a biopic - which often feels like a no-win balance. Enough science to make it interesting for its target audience but not too much to alienate everyone else. Enough of a human story expected from a biopic but not too much to make it boring. Personally, I thought the balance was right. There's some real math and science in the story, the history is absolutely fascinating, the American family elements don't add much to the story, but a necessary element of a traditional biopic.
The other user reviews are complaining about the "adventures" part of the title, as if they're expecting an action movie or something. But the title just comes from a part of the dialogue when they make the big decision to move to Los Alamos, "Are you ready for an adventure?" Immigrants moving across the country, leaving their "cushy" academia job for the Manhattan Project. That is an adventure to them.
There are a lot of big names and interesting aspects to the Manhattan project, and a lot of interesting and different stories that could have been told, but this one is personal to the filmmakers. The Polish identity is a running theme here. It's an ode to Stanislaw Ulam and should not be viewed as a history of the Manhattan Project (which it is not, it's just one small aspect of it that Ulam was involved in) and is very much a traditional independent biopic.