We are an "older" couple who have just spent 8 weeks in Marseille and had a wonderful time. I thought I would start a new "thread" as my comments are quite the opposite to those recently made by another Australian contributor.
In case you are thinking that we must be very rich to afford accommodation for so long and/or why we stayed in the same place for so long. The answer to both is that we did a home exchange with an apartment in the Prado beach area. Not only did we enjoy visiting the city, but we also loved trying to "live like a local" - catching the bus, using the metro, shopping at the supermarket and markets, walking in the park and along the beach area, etc.
A few days after we arrived we did a "walk" with Christian from Marseille/Provence Greeters. This was a wonderful introduction to the city. It took about 3 hours and he showed us many interesting places around the Panier and the Vieux Port area, along with the history and other information. I absolutely recommend this excellent service, especially for those who may be here for a few days or longer.
We had a car so we did many day trips to other towns and villages and saw some amazing places and things - history, lovely views, interesting architecture, markets, wineries, etc. I could go on and on. But we also spent many, many days simply catching the bus into the city to visit the places of interest (there certainly are many of these) or to just wander around the Canebiere and Vieux Port area. We loved to share a moules et frites with a pitcher of rose and "people watch".
We were not robbed, mugged or ever felt threatened in any way. We also found the local people to be very polite, helpful and very patient with our very poor attempt at their language.
Thank you to all those on TA who gave us advice - both leading up to and during our visit - and thank you Marseille for giving us such a wonderful time. We hope to return some day.