I stayed in Ivy's place for four days during my trip to London and it was exceptional. The location was great as it was only five minutes walk to Brixton station, with Victoria line you can get to city centre within 20 minutes. The house was very clean and tidy, there were some house rules to follow but they only make Ivy's and your life better and easier. Quality breakfast was provided, which was the first time I was offered throughout my experience with Airbnb, an absolute delight to start your morning.
Overall I can't recommend Ivy and her place highly enough to all travellers. The fair price, cleanliness, hospitality, is everything you are looking for in London.