We were met as planned by Elena's friend Sarah, who asked us to sign an "initial" condition report for the flat.
The flat is smallish for our family of four, but slept us all comfortably. It had all the facilities as advertised, and as needed for a family stay. Its location is excellent, with the tower and river only 10 minutes walk away, and a metro station within five minutes.
We had some problems with our check-out being unexpectedly moved to an earlier time than previously agreed, but this issue was finally resolved with the next tenants kindly agreeing to hold our luggage for us.