Old, Tired, Caustrophobic
Cramped, no plug ins that didn't require getting on hands and knees to charge electronics...expensive wifi hook-up with a $700 price tag for a three-day stay. Could have been in Playa Del Carmen at a 5 star resort for a week for that. 
Neighborhood is creepy at night with a shelter just around the corner and lots of pan-handlers. 
Looking for Union Square area? Keep looking!!!