Had a great time at Helen's, the room and the kitchen and bathroom were perfectly clean and very pleasant, all excepltionally equipped. The communication and getting in and out was very easy and flexible. Unfortunately didn't get a chance to meet Helen in person, but our arrangements went smoothly non the less. The only issue was the wifi connection, which was unreliable. This is not uncommon for Berlin though, and I believe that it will be easily resolved :) All considered, a place and a host I would happily recommend!