I stayed at Veronica's flat for 4 nights at the end of December and I couldn't recommend it more.
The flat is clean, cozy and artsy. There are two large leather sofas in the living room, which I spent a lot time there to read or watch TV. The bed is comfortable and all the linens are so fresh they look like new. The kitchen is fully equipped. I bought food from nearby Sainsburys and made breakfast or dinner for a few times. There's also a washing machine/dryer in the kitchen.
The flat is right opposite to the Greffrye museum bus station. I was initially worried that there's only one overground station nearby, but happily found that London bus service is pretty sufficient and reliable. Therefore, although Hoxton overground station is less than 5 minutes walk away, I used bus as major transportation during my stay.
The flat is close to lots of Vietnamese restaurants. I highly recommend BunBunBun, which is about 300ft from the flat. Within 10 minutes bus ride, there're greater options of restaurant/cafe/bar/stores, including the Spitalfield vintage market.
Veronica is great host. She's easy to communicate and respond to all of my question quickly.
I would definitely stay in Veronica's flat again when I come back to London.