Just do it
Pros
Landlord is friendly and lovely and lives in the building. It’s been in her family for years. The worst I ever saw were fruit flies.
Cons
Almost nothing - there’s definitely a smoker on the first floor so the hallway always smells like cigarettes.
Good Manhattan Living
Pros
Quiet (if not street facing), great location
Cons
Hot water didn't always work well. Cramped living.
Advice to the owners
Don't raise the rent!