I had a great stay at Bertha's airbnb. The Room is clean, with and extremely comfortable bed and in a great location. The internet works perfectly as well. I work a lot from home and never had one problem with the internet which is really important for me. Bertha is an incredible host and was incredibly helpful on my last day as I was flying out of Mexico City. I definitely recommend this place. It's also right next the Angel of Independence which makes for great walks in the morning and in the afternoons/nights.