- "I wish the book was simpler" (Jesse)
- "I wish the book was more advanced" (Murat)
- "I wish software engineering was more advanced" (Andrew)
- "I didn't understand the arguments the author made for why studying single-server exponential response time systems helps with drawing conclusions for time-sharing, heavy-tailed response time systems" (Jesse)
None of these paint the book in a bad colour, as far as I can tell. They say more about the reader's expectations than the book itself.