I've just passed the 9i upgrade (1Z0-030) with 49/56.

The exam is tricky but not very difficult. They do check for syntax and I was surprised to see how superfluos the questions on RMAN and RAC were.

I did use only the ILTs to prepare. I did run every new command and used almost every new init.ora parameter. This makes you confident.

The total time I spent on test preparation is about 200 hours including reading and playing with 9i.