The listing is a lovely big bedroom, very comfortable, with clean, spacious en suite bathroom and access to a pretty garden. The shower is a bit cramped, especially if you’re over 5’9”, because the shower head is low. The location is superb. Covent Garden, the West End, British Museum, St Pancras and much else is walkable and Tube and bus links to other parts of London are excellent.
You may find the photo misleading - it shows Jason’s kitchen and living room, which are not part of the let, though you have use of the kitchen. That means socialising with Jason and family when you use them, but they are all friendly and interesting.
One peculiarity: the door to your room doesn’t lock. Apparently there’s never been a problem, but I think a lot of people (like me) would prefer to be able to lock the door. That would be very easily fixed, so perhaps Jason will put that right.