I am preparing for the subject GRE this April. I have some questions.

1. Is the syllabus in "Cracking the GRE" enough? I mean the content of the questions, not the difficulties of the questions. Like all the definitions and theorems are enough?

2. If "Cracking the GRE" is not enough, could anyone tell specifically which part I should study more?

For example: for multivarialbe calculus part (calculus II), it does not say anything about triple integrals.

3. How close is the real GRE compared to the practice test from ETS website? By "close", I mean the difficulties and the syllabus. For example, same difficulties but real GRE covers more fields, or real GRE has more difficult problems (almost same syllabus)

4. I'll take it on April 10. When should I expect to get the result? by earliest mean (by phone?).

Thank you!