I had a lovely stay at Cathy's place in Cartagena! The studio itself had A/C and WiFi that worked perfectly. It was also fun to take in the city and people watch from the balcony (the first night we were able to see a wedding parade as well as fireworks!). The Old City is bustling though so you may want to bring earplugs if you're a light sleeper.
But I can assure you, the location is the best part! We were able to explore so much of Cartagena by foot and it felt as if the apartment was in the center of the Old City. It was definitely the perfect place to rest up, especially midday. Being that it was very hot in February, cooling off in the A/C was amazing!
Additionally, her host Benjamin was so helpful when I arrived, answered all my questions, and even arranged a day trip for my boyfriend and I! Cathy was also very helpful and responsive. I would highly recommend staying at her place!