I stayed in this apartment for 8 nights. I had a good stay. Some details below:
Location: The apartment is right next to the Riddlesdown train station. This is in Zone 6. So, if you travel to London Victoria, you will need to take a direct train that takes 30 minutes; you need a ticket that is valid for zone 1-6.
The location is convenient in general.
There is no supermarket nearby. There is a fish n chips restaurant at a 6-7 minute walk. They serve average food.
The room: It is a nice and comfortable room. The bed is very nice to sleep on.
The bathroom is shared.
The kitchen is fully equipped. I did not use it though, because I always had food outside.
The communication with the host is pretty smooth.
I used this place for only sleeping at night. I used to leave for my tours early morning before anyone woke up and I used to return at late evening.
Overall, I think, for a solo traveler, this is a good place to stay in. I recommend.