I've travel a lot and been with a lot of tour guides.  Mohammad Gari is the best experience I have ever had!  He's an expert and has the knowledge for his culture, history and religion.   He definitely provide an eye opening experience for me even for one day!  He is so welcoming and there to answer any questions we have during the tour!  And he is so proud of his culture and his own origin which shows the great side of Saudi Arabia that I never seen/expected !  I would highly recommend Gari to everyone who will be visiting Jeddah!  You won't regret it!