Jocelyn is super pleasant and Andreas is good company. They make it easy to be social or to keep to yourself-- I did both during my stay.
The doorways to the rooms are insulated. Once you're inside your room, you'll have a sense of privacy and seclusion. The room itself, like the apartment, is simple: nothing to complain about, but nothing charming or special. The mattress is okay, but could be firmer.
The location is good: quiet, and less than a five minute walk to the jubilee line at Southwark. This makes the location especially good for people like me who want to be close to the city center but also able to get to the O2 really quickly.
I recommend Jocelyn's place to anyone traveling solo. I think many couples or duos would also be entirely satisfied, but I personally need more space when I travel with my spouse or with a friend.