I stayed in the flat for three weeks while I was in London for work. It was perfect, the location is ideal (5 mins walk to Russell Square Station and not much further to Kings Cross). The flat is in a cool neighbourhood with plenty of shops (Brunswick Centre - including a Waitrose supermarket) and independent cafes and restaurants on Marchmont Street (great Italian place across the street). The flat itself was a great layout, it is open plan with a kitchen (with everything you would need), an oven if you are staying longer and want to cook and a big fridge. As I was there for work there was also a great little desk and chair set up by the window which acted as my mobile office for the time I was there! The bedroom can be separated by a big sliding door which was good as you could make it a private room if you have more people staying in the flat.
Diana was also a great host, she met me on arrival and showed me everything I needed to know about the flat so it was a super easy check in. I didn't need anything during the stay but know that Diana was always available if there was something I needed which was nice.
Overall a fantastic stay, I felt at home as soon as I arrived and it was a perfect base for me while I was in London. I highly recommend it to anyone visiting London for any length of time if you want a real local London experience!