I enjoyed Mister Memory very much, and found myself drawn along through the unfolding of the case. The novel is a page-turner, and I found that I could not put it down once I got into it. Characters such as Petit and Ondine are developed well, and Sedgwick did a good job of staging the relationship between Morel and Marcel.
The one weakness of the novel, however, is the ending. I thought it was anti-climatic and flat. There was also an unnecessary turn to broad philosophical statements that took away from the trajectory of the plot.
That said, Mister Memory is a well-crafted and entertaining exploration of human depravity and the dangers and pain of memory.