The communication with the host was excellent, Carlos immediately answered any of our questions, he was also very flexible about our arrival (7AM). The room was ~7 min walk to the Zócalo and the other attractions were also within walking distance, so very well located. The street itself isn't particularly attractive and not many people around after dark, but we didn't feel unsafe coming back after a day out. Our room didn't have any windows and was a little cold (I imagine it is an advantage in the summer, but we were there in January), but since we only used the room for a couple of hours during a long layover, it wasn't much of a problem. It was clean, had hot water and wifi, a convenience store that's open till quite late next door. All in all, good value and a very helpful host.