Guillaume and Julie's place is 100% recommendable! The two have an admirable taste and the location has it all: quiet and comfortable, yet only a stone throw away from a lively night life, places to have breakfast and various tube station to get wherever you want to get to. Also there are various bike stations close by and it's super easy to get to the city in no time. I visited Paris with my 14 year old niece and we felt safe and secure at all times. Furthermore, Guillaume and Julie were second to none in terms of communications and making us feel welcome and at home. Again: We can only recommend this lovely gem of Paris. :)