Excellent place! Dave and Lourdes are amazing hosts; they were very accommodating, prompt to reply to my queries and ultra friendly at all times. I stayed at their flat for 7 weeks while doing an academic placement at one research centre in Tlalpan and I found Dave's property the ideal option in terms of location, price and facilities. The flat is spacious, clean and comfortable with everything that you need for a long stay. A lovely lady came once a week to clean the flat and linen and towels got changed every forth-nigh. The area is safe, you can find shops and amenities nearby and it's a pleasant 10 minute walk to Tlalpan historic centre. It is located on a busy road, and one of the rooms can be a bit noisy at night, but it did not bother me as everything else more than compensated for that. The shower pressure is low, but then again it was not a major problem for me, and as Dave explained it is a structural problem with the building rather than something that can be easily fixed. Apart from those two minor things, I only have positive comments about this property and its hosts. I hope I can come back soon to Mexico City when I will surely visit Tlalpan again.