Milena's place is at a great location in Greenwich. Perfect if you are coming over for a concert at the O2 (which is what we did). It's also close to Greenwich park, the observatory, museums, etc, so if you want to explore the area, I highly recommend that you stay there.
Milena is a very friendly and attentive host. Communication with her was super easy. We had everything that we needed in the house, although we didn't use much of the facilities. Would go back :)