I took Amemiya's advanced econometrics class in graduate school and I cannot imagine a better introduction to graduate econometrics. The book reflects Amemiya's brilliance; topics are presented lucidly and logically. However, this book requires some mathematical background -- real analysis and linear algebra -- and is not a good first text in econometrics. Overall, I highly recommend it for people who want to learn how to think like an econometrician. It is absolutely essential for practicing econometricians.