Didn't get to meet Penelope in person, but she seemed very nice and was quick to respond to all of my communication. The place was in a great location. Right in the middle of all the Condesa action, but half a block off of the closest main drag, so the noise was minimal. There is a rad food co-op called The Green Corner that is one block away. Kombucha, tea, and many other things that can be a little hard to find in Mexico City for hippie-types like me.
The space was simple and clean and very interesting. It's true that it may not be an idea fit for travelers who are lugging larger heavier loads. You must climb several flights of stairs to reach the entrance to the studio. I was definitely winded by the time we got to the entrance of the studio. You actually might hurt yourself trying to get your things down the very narrow spiral staircase that leads down into the studio space. And watch your head! The kitchen has what you would need if you wanted to make coffee, or a small meal and has a nice view. There is also a nice little terrace area with table and chairs. Great shower! I liked the light-filled kitchen even though it could get a bit warm during the day.
Overall, I would recommend this place to those who are traveling light and are in relatively good shape/health. It filled our needs perfectly for the couple of nights we spent there. And, again, you can't beat the location. Thanks Penelope! I would definitely stay in this studio again!