The book is held as canonical scripture today in the Catholic, Eastern Orthodox, and Oriental Orthodox churches (except for the Orthodox Tewahedo). The book is not part of the Hebrew Bible (Tanakh) and is not considered canonical by Protestant denominations nor in any of the major branches of Judaism.
I found 1 Maccabees interesting, especially as the Wikipedia said scholars consider it rather historical. I liked learning about the Maccabean revolt. 2 Maccabees was slightly less interesting because I had already read about several of the events and I don't find the martyring of 7 sons and their mother to be an enjoyable story to read.
Nonetheless, I did appreciate the couple of meta-narrative comments made by the author like this one at the end of 2 Maccabees 15:38, "If it is well told and to the point, that is what I myself desired; if it is poorly done and mediocre, that was the best I could do."