Better than average but with that many miles who can say without a comprehensive inspection?
They are decent vehicles. As long as somewhat regular maintenance was performed you will probably be fine.
Step up to the G37 if you can. Pretty good reliability.
Looking for a Used G35 in your area?
CarGurus has 2,865 nationwide G35 listings starting at $1,400.
Search INFINITI G35 Questions
INFINITI G35 Experts