As others have said, it's a stressful 2.5 hours. If doing it again, I would split it into 2 sessions.
Best piece of advice I had: "don't fail yourself". People who feel they have performed poorly have been known to call it a day and hand over the controls. I had a pretty bad nav, a dreadful PFL (changed my chosen field 4 times on the way down), and a go around on the flapless landing: and still passed (though I thought I had failed). It's as others have said: it's about flying safely, good use of judgement, spotting errors and correcting where possible.
Best of luck.