Didn't have the pleasure of meeting Guillermo as we organised everything through his brother Ricardo. Ricardo was a wonderful host - lovely to chat to and helped us out in a jam when we realised we had forgotten our adapter. He was also super communicative when it came to booking and helping us check in and making sure we were having a good stay in London. The apartment is wonderfully located - easy walking distance to a number of tube lines. We didn't realise that another room was also being rented out during our stay, which would have been nice to know beforehand, but it didn't encumber our experience.