Guillermo was very responsive, both in accepting me, and in providing directions, check-in instructions, etc.
I was pleasantly surprised to see that the room had a kitchenette - I hadn't noticed that detail in the description, if it was mentioned.
The room, toilet and shower were very clean.
One negative detail, for light sleepers: while the walls are thick and you cannot hear any sound from the neighbors, the windows are not double-glazed, so the street traffic may wake you up. It's not too bad, the traffic is light.
The location is great - in walking distance to the Convention Center (or I could have taken public transportation), restaurants, museums, etc.
A good experience.