First off, the host...Steve was great in accommodating our late arrival (not to mention helping me with my luggage up a few flights of stairs), and even gave us some recommendations for late eats.
The apartment...it couldn't have been in a better location. King's Cross was only a 5min walk and it connected to a few lines, which made it easy to get to different places around the city. Also, it was great to have the apartment close to a number of convenience stores that were open late.
Overall, we had a great time in London!