We have stayed 2 days at Jocelyn's apartment and from the visitor perspective, it was amazing experience.
Location of the apartment is very convenient, it's literally around the corner from the city center (some 10-15mins from the Big Ben by foot), but despite that, the neighborhood is very quite.
An apartment block is stylish, basically what you are expecting from the British architecture. An apartment is quite spacious and Jocelyn was very nice to let us use all the appliances. The room itself has all the equipment you would need for a few days stay - comfortable bed, wardrobe (with hangers) and a pair of chairs. In the morning there wasn't any noise from the outside.
Jocelyn has provided us with very helpful information regarding a public transport, tourist attractions and restaurants, from which we tried 2 and the food was really delicious.
We would definitely stay again and recommend this choice to everyone visiting London.