Yvonne and Nick are a very nice and easy going couple. It was lovely to meet them. Their home is very centrally located in the Notting Hill area and is literally a 3 min walk to the tube station and less to grocery stores and other shops. They were nice to allow usage of everything and give me a spare key so that I could come and go as I please.
A couple of things to note for other travelers though -- the unit is on the fourth floor, which means it gets warm in the summer and most London homes don't have fans or air conditioning. Nothing they can do about, so just FYI. The room is small so ideal for one person; might be a bit cramped if there are two people.
They were nice enough to adjust my check in time per my convenience.
It was great to meet them. Wish them luck.