We had a wonderful stay at Luis Carlos' place. From the start, the professionalism and responsiveness from his staff were reassuring. I do recommend downloading WhatsApp if you don't have an account already, so you can more easily communicate with them (or anyone in Mexico, in general).
The place itself was great. The location could hardly be safer or more conveniently located, and the apartment is well-lit and tastefully decorated, not to mention comfortable and well-appointed. This is hard-to-beat value, to the point where I'm thinking of renting with them again next time I'm in the city!