The book really gets going when Fyodor, the selfish and ruthless father, is murdered and Dmitri is arrested. The following trial is interesting and includes psychological themes such as morality and motive, discussed from different points of view by the attorney and prosecutor.
The dialogue is often deep, philisophical and interesting. But the book is heavy and sometimes so detailed that the pace becomes painstakingly slow. It is considered a masterpiece, and it really is, but I somehow got weary of the meticulous details and thereby cared less about the characters than I initually did. However, it is a great book and especially the last hundred pages are amazing.