I traveled several times in Madagascar and me and my friends always used a car and driver. We traveled together with Jonah. He speaks English, Italian, French and ofcourse Malagasy. We enjoy his company as a driver and a guide. He can tell you anything you want to know about the people and the nature.
You can contact him: ramartour@wanadoo.mg / ramartour@hotmail.com
You can go with local transportation, but it's much slower and brings you only to busstations.. I love the comfort of the car. It brings us right to our hotel and to the places I want to visit. Especially if you travel with 2-4 people, it's the best way to get around and not much more expensive then local transport.
