John and his team were professional, friendly, and responsive. We can't say enough good things about them and would absolutely stay again. The apartment itself was spacious, clean, and thoughtfully outfitted with everything you would need as a traveler. Even though it is below ground, there's a lot of light. It's easy walking distance from a number of tube stops, Hyde Park, pubs, grocery stores, pharmacies, etc. and in that sense the location was ideal. It was a bit noisy at times and the apartment is not insulated to sound but it's a city, so that should be expected. If we had any complaints/suggestions, the linens were clean but had really seen better days (stains on the white towels, etc.). They were clearly cheap to begin with and it wouldn't be costly to replace them - it would make a big difference in perception of quality.