Catania is worth visiting, but I would not recommend it to everyone.
What made the city work for me was the combination of local atmosphere, good food and easy access to Mount Etna. It is less polished than many famous Italian destinations, so whether you enjoy it depends heavily on what you expect from Sicily.
What Catania Is Really Like
Catania feels much less polished than places such as Milan, Florence or central Rome.
The historic center has impressive buildings, busy squares, churches and markets, but a few streets away you can suddenly find graffiti, litter, old façades and areas that feel much poorer.
The city is at its best when you stop expecting postcard Italy and start treating it as a real working city. Markets are noisy, traffic is chaotic, scooters are everywhere and some streets are much more interesting for their atmosphere than for their architecture.

What I Liked
The city is easy to explore without a car
For central Catania, I would not rent one.
I walked most places and used public transport or a rental scooter when I wanted to cover more distance. Parking and narrow streets would have made a car more annoying than useful.
If you stay centrally, most of what you want to see is reasonably accessible.
The markets are more interesting than some attractions
Catania's markets are one of the places where the city feels most authentic.
They are crowded, messy and very local, which is exactly why I found them interesting. This is also where carrying some cash is useful, because smaller sellers do not always operate like restaurants or larger shops.
Food is easy to find without overplanning
I ate well without building the trip around famous restaurants.
One place I liked was Pizzeria - Trattoria Coppola, where the atmosphere felt local rather than tourist-focused. The pizza and carbonara were both very good.

I would not travel to Catania only for food, but the city makes it easy to eat well without turning every meal into an expensive event.
Mount Etna makes Catania much more useful
This is one of the strongest reasons to stay here.
Catania is a very practical base for visiting Mount Etna, especially if you do not want to rent a car. I booked a small-group tour with hotel pickup and spent most of the day on the volcano.
You can read the full experience in my Mount Etna from Catania guide.
The tour also included a stop at Enoteca dell'Etna, which was a good way to finish the day with local wine, olive oil and Sicilian products.
What I Didn't Like
The biggest negative was simply how neglected some parts of the city looked.
There is visible litter, graffiti and poor maintenance in places. Some streets are perfectly pleasant, while others nearby can feel much rougher.
I also would not wander randomly through quiet side streets late at night. I never had a serious problem, but there were areas where I felt more comfortable staying on busier streets.
If safety is something you are especially concerned about, I cover that separately in my Catania safety guide.

What Is Actually Worth Seeing
I would not try to fill three days with attractions inside Catania.
The city center, markets, main squares, churches and port are enough for a solid day of exploring. The appeal is more in walking through the city and seeing how different areas connect than in ticking off a long list of major landmarks.
If you want a practical route, I already have a separate one-day Catania itinerary.
The port is also worth a walk, especially later in the day. I found that part of the city more interesting for atmosphere than for any specific attraction.

Who I Think Will Enjoy Catania
Catania makes sense if you like cities that feel local, busy and imperfect.
I would recommend it if you want good food, markets, everyday Sicilian atmosphere and easy access to Mount Etna.
I would be less enthusiastic if you are looking for a polished city break, spotless streets, luxury shopping or a long list of major attractions.

Final Take
I think Catania is worth visiting if you know what you are going there for. I liked it more for its atmosphere, food, markets and access to Mount Etna than for its monuments.
It is rough in places and certainly not the most beautiful city in Italy, but that did not make it uninteresting. I would visit again as part of a wider eastern Sicily trip.