I felt very comfortable in Jocelyn and Linda's house. It is very clean and cosy. The couple is extremely hospitable and helpful. The windows of the room however go to the main street and if you have sensitive ears , the transport noise from the street can be a problem to fall asleep especially in summer when you want to keep your windows open. The area is quite pleasant and safe.
Now some information for those travelling with big suitcases. The station Waddon doesn't have lifts!!!! From Waddon you can reach London Bridge within 15 minutes and a ride to Victoria is much longer. I've also made good experience by going to London from East Croyden Station. It is also more modern and you can roll your suitcase without a problem. If you prefer East Croydon Station as an arrival station , you can take buses 407 or 410 from there till Purley /Waddon within 12 minutes. Since it's zone 5 it makes sense to ask your hosts for tips so that you can travel cheaper between zones 1-2 and 5.