From April through October, Nice has the holiday tourist feel. The place is just packed with visitors from June through September, and the shoulder months are almost as busy. It's a lot of fun.
Another great thing about owning a nice apartment here, you can arbitrage your apartment for a vacation almost anywhere else in Europe, virtually always for less than you're getting in rent from your apartment. In some cases, much less, such as if you go to a Baltic Sea resort, or Slovenia or Croatia. That's seaside. If you go inland, it's even less. You could tool around beautiful central Europe, even in France, all summer and come back with more money in your trading account than when you left. For people like me, on a little bit of a budget, it's a nice perk. 😉
As for produce, there's a fresh produce stand about 120 meters from my door. Place is always busy, and the produce is cheaper than the supermarkets for most things, but not all. But it's cheap for a reason. I figured out after throwing shit away once or twice a week, that the guy buys lower quality merchandise. So I stopped shopping there. The Halal butcher shop/convenience store right across the street from me actually has better fresh produce, and his prices are competitive. But the best quality fruits and veggies are at the Monoprix, Carrefour, Casino, and Utile. There's also an ALDI just a few blocks away. Produce is always good there, and really cheap. Another discount chain on the same block is Netto. Haven't tried it yet.