The plot is clever but the reading experience is not enjoyable. The characters are mere sketches and the writing is filled with adverbs.
The reviewer acknowledges the cleverness of the plot but finds the overall reading experience lacking. They criticize the characters as being mere sketches and the writing as being stuffed full of adverbs. Despite the clever plot, the reviewer does not enjoy the book as much as they had hoped. They find the characters to be one-dimensional and the writing style to be less than engaging.
Quick quotes
The plot is certainly clever, but I didn't much enjoy the reading experience.
The characters are mere sketches.
The writing is stuffed full of adverbs instead of showing the action.