Flat had everything I was looking for. 2 bedroom suite with a fitnes center near the underground.
We stayed 4 days and enjoyed the short 5 minute walk to the underground.
It's not at Kings Cross but within 2 stops on the tube.
Fitness Center had plenty of machines and cardio and some dumbbells. It was however worn down. it did ok for a few days however there was a gym next to the entrance with more equipment.
Residential area with no bars near by.