Javier's apartment is very well located. It is a good place to stay for a short trip in London.
However, we had a bad experience when we got to the apartment. It wasn't clean. We got to the apartment at 2:00pm, at the same time the cleaner man did. We had to see how the other guests left the apartment (condoms, fag-ends on the floor...) Salvador, the cleaner, did a very good job cleaning it.
Moreover, we had another issue, one of the windows was broken, we informed Javier (even sent him a picture) and there was no answer. We had to buy tape to avoid the air and the noise to get into the apartment.