Yes: The Idiot is one of Dostoevsky's great novels and is often read as the most personal of them, but it is a long book with an uneven pace, which rewards readers who accept the slowness of its conversations. If you are looking for action, you may be disappointed; if you want characters who stay in your mind, it is well worth reading.
The book gives scenes that are not forgotten: the train on the first page, the guillotine described to a servant, the birthday party where Nastasya throws a hundred thousand rubles into the fire, Hippolyte's Explanation, and the final night in the house on Gorokhovaya Street. And it asks a hard question: what unscheming goodness can do in a world where everything has a price. It is personal because the condemned man the prince describes has a model in the author's own life, who went through a mock execution in 1849, and because Myshkin's epilepsy is his own.
What may weigh on a reader is its length, about 890 pages in an ordinary edition, in 50 chapters, and the many Russian names: the prince is Myshkin, Lev Nikolayevich or simply the prince, and Rogozhin is Parfen to the prince. The action moves slowly, among salons and conversations. A tip: read Part One all at once, because it lays out the whole problem in a single day.
Opinions are divided. For some, Myshkin is the most beautiful figure of goodness in literature; for others, the strongest objection is that a good man who is only incapable of cruelty would be harmless, not virtuous, and so he feeds the abuse around him instead of stopping it. The book sustains both readings, and that is what keeps it alive.