Two disclaimers for this review: 1, this was my first P.D. James novel. 2, I believe that Agatha Christie was the goddess of all mystery writing.
I am used to a body within the first few pages, and letting Hercule Poirot deduce things from there until the solution is provided. However, there are no bodies until 80 pages into the book, and most of the discussion includes things that Dalgliesh brings out later with witnesses anyway, making them redundant.
Also confusing was James's apparent escape from reality with character names. Some are completely absurd, like the characters names "Makepeace" and "Gotobed." Combining words into names detracts from the proposed seriousness of the situation.
This book is much heavier than a true murder mystery, and the decision comes down to this: whether you want a true murder mystery, where you follow facts and psychology in the attempt to deduce the murderer, or whether you want a deeper novel -- a P.D. James novel -- where, along with the murder, time is spent reflecting on life and the world in a more philosophical fashion.