I was staying almost 2 weeks at Adrians place and I really enjoyed it! If you are looking for a qualm and cheap room in the center of Mexico City you probably won't find anything better.
A lot of great restaurants are close by and also the metro station is just a short walk. Sharing the bathroom with the other people was never a problem as there are 3 bathrooms for 8 rooms and I never had to wait.
All in all a great experience and I would definitely book it again.