Staying at Cathy's place was great! Both Cathy and her husband were very welcoming and were always responsive and helpful. The house is beautiful--it is a private guest house that shares a garden with cathys house which makes it very safe. The house is also in a good spot to walk to places from-supermarket, Coyocan square, coffee shops, etc.
A couple of useful things to know: there is a water fountain for drinking water that they supply, at the time of our visit there was a king-sized bed (it was a little confusing for us from the photos), there's a beautiful skylight but be prepared to wake up with the sun (I loved it), Viveros park is good for runners.
We enjoyed our stay a lot thank you both!!