We stayed at Lisa's place for 2 nights in July and it was a fantastic break. The instructions and check in was spot on with no issues whatsoever. The flat size is impressive for central London, whilst there was only 3 of us including our 4 year old it would easily accommodate 7 adults. The flat was clean, tidy and had all the amenities you could ask for. It was sweltering weather when we stayed and the fact there was a fan in each room was a huge bonus.
We worried about the train noise as the flat is over an underground line but this didn't bother us at all.
The location is fantastic with a 10 minute walk from Kings Cross Station and a ten minute walk to Islington with a wealth of restaurants and bars. There's also a nice bar opposite the flat and Frequency Coffee Shop 100 yards down the road is also worth visiting.
All in all an excellent stay and Lisa is a wonderful host so would highly recommend.