You really can't beat the location. This value / economy hotel is clean and very well located with a friendly staff.
I stayed here with friends for my first trip to Mexico city. The hotel was within walking distance of many major sites and was particularly well suited to traveling with friends.
Have a need for a room with 3 double beds? Just ask. This worked really well for my travel friends and I. No awkward bed sharing / "head to toe" discussions.
PS - The nostalgia of visiting a hotel that still issues metal keys was quite novel! However, it is also a bit of responsibility. Make sure to keep track of it or you might find yourself in a pinch.