We have been a tenant on a flat managed by Lewis during 3 years and it was our first 3 years in London. For a first experience and based on feedback you can find on internet i can definitely promote Greenstone as one of the best agency you can find in London. The staff is responding very fast. The follow up with the flat was well done. They are listening to potential issues and try to sort it out for you in a short term. Also when it was time to leave, Lewis helped us a lot finding a new flat for my family and it was great because his network is awesome. Go for them without any fear.