To what degree should I consider Perec's attempt a success? It appears as if the place exhausts Perec before he can exhaust it. Each subsequent day's entry is shorter than the last, as is the time he spends on it.

By the second day, he's already grown tired of the transit buses. One could argue his reporting on them Friday removes the need to discuss them on Saturday, but his return to them on Sunday firmly places their absence on Saturday as a change in Perec.

I think this is largely to the book's credit. Better Perec exhausted than the reader.