Tina is very nice and available. She gave us all the informations we need.
The flat was very clean, well-appointed and looked like the pictures. The rooms ar big.
The location is convenient : 4 minutes walk front the Tube and ten minutes from King Cross/St Pancras.
A good place to stay for 4 people (not more).

Small critisism : the main bed room is a little noisy. You can hear most of the night a regular noise. Maybe the fridge in the kitchen behind the wall or the water heater. The kind of noise that can annoy light sleepers like me.

BIG downside, the sofa-bed is more like a camp bed (and a bad one) than a bed.

We were five people. As expected, one person (65 kg) slept on the sofa bed in the living room. It is very uncomfortable. The mattress is ultrathin and the bed base… "ghostly" . So you feel like on a camp bed (and a too soft one).

Our friend unfortunately slept very bad for 3 nights. Everyone tried the bed for a few minutes and made the same observation.
Therefore we strongly DO NOT recommend this place for more than 4 people. Certainly not for 6 because it would have been absolutely impossible to sleep at 2 in the sofa bed.