Karla is a super nice and beautiful host! My initial flight to Mexico City was cancelled, which delayed my itinerary for one day, but she told me it was ok to change my checkin date without extra charging.
The room is very clean and bright, facing a university. The bed is comfortable too.
In general, the location is good, I have to say, you're 5-10 min walking distance from the center, also near to meteo station. You can find good bars and restaurants on Isabella de Catolina and Ave 5. de Mayo. It's a little bit noisy at night, but if you're a night person, you will be fine. Karla also recommends me some places to visit. I went to Azul Restaurant, an awesome place to dine out with friends!