I did a "night tour" of Mdina. Great!
I took a day tour of Mdina and the entire island. I didn't have time to go over to Gonzo.
Public transportation is inexpensive, useful, and easy! ($4.00 for an entire day, including my final ride to the airport.
I recommend Malta Airlines.
I will take my wife the next time I go.
I saved a few travel brochures, etc. I am happy to mail them to anyone that wants to have them for your visit.