I don't think anything good about it. Apart from the standard anti-Semitic polemic, which innovates nothing, he insulted a number of people whom he had no right to insult, and reinvented a number of episodes of his own biography in a self-serving and mendacious way. If you wish to look into it, you can start here:
Did you download it from somewhere before reading it?
I read it online, in Russian. Well, in the late-Solzhenitsyn version of Russian, which diverged considerably from the standard language. I don't know if there is an English translation of it. I saw on a few occasions that people expressed the intention to translate it, generally as part of some anti-Semitic agenda, but I don't think that anybody got past a few chapters, since there is nothing particularly new or interesting in it, even (and especially) for anti-Semites, and rendering Solzhenitsyn's unusual diction and neologisms in another language is difficult.