I stayed 3 nights at nina's and it was as listend - a clean room with a double bed and a shared bathroom. nina wasnt at home when i arrived but made sure someone was around. even "late check-out" wasnt a problem as my flight home was in the evening! she has a kid and some friends around, but never bothered me and all was really good.
place is few minutes away from south kensington station which is just great to explore the city (picadilly, circle and district line)! i always felt safe!
nina always response within a short time.
definitely recommend this place