I stayed in the flat near Mornington Crescent for a month.
Advantages:
Great location, very near several buses and tube station, and awesome Camden Market
Less expensive than others
Very nice host - helpful, responsive and kind
Well furnished place - toaster, new washing machine...
Disadvantages:
Some mould in the bathroom (renovated old building)
Awful mattress
Don't expect freshly ironed and beautiful linen on bed