I contacted Sacha through Zoopla. He was very attentive and told me the properties the agency had to rent based on my budget and zone preferences. He also called me to speak about them.
When we went to see the places, it was very fast and I did not have time enough time to watch property details, which I did not like. However, I asked him to see one property again and I had enough time to see it properly.
Overall it was good.