I stayed at Sylvan's for 4 days, and my wife for 7 days later on. The room is very cozy and convenient, much better than we expected! Privacy is very well kept, although you share the bathroom with the other room. Sylvan is very nice and helpful, and let you have your own quiet space.
The only problem that might occur is if other guest come or leave late at night - noises from the corridor or bathroom are quite felt... That wasn't a big issue anyway. Location is convenient - 5 minutes by bus to the tube (fulham broadway or a little longer to earl's court) or 15 minutes walk to Fulham Broadway. Many supermarkets nearby, and a nice pub (Fulham Mitre) 8 minutes walk. Very convenient for a one person stay in London. We hope to come back!