My friend and I had a very nice stay with Carmen and her friend. The flat is really clean, wich is really nice. It's really well located on south bank ( 7min walking from Black linen, direct from St Pancreas Eurostar station). They are very helpfull (they looked for us the most economic transport card option).
The bed is really comfortable and big (Queen) comparing to others room I've seen that were big enough just for a small bed. Carmen also provide an adaptator, toothpath and shampoo. That all those little details that make a stay really nice !