Everything! The owner was the most delightful man! I got in quite early and he was able to get me checked in so I could take a much needed nap before he even took my payment. He gave me a full history of the city and let me know all the spots to hit, which was quite helpful. Luckily, I speak Italian, but since my Spanish is better, if I ever was stumped, we could always communicate.
The room was spacious, clean, and the heat was not a problem. The WIFI worked better in the evenings, but that isn't unusual, so it didn't bother me one bit - I was at the beach during the day anyway!
The location could not have been better. The train station was nearby, and the city bus to the beach was a step out the door. All the restaurants and the main plaza were an interesting walk away, so there was plenty to do and see.
The most amazing thing was that the owner even drove me to the airport himself so I would not miss my flight, which I thought was exceptional. I loved Cagliari and will most definitely stay here again!!!