Professional yet still thoughtful and personal.
Eg information before arrival is comprehensive. There is a property manager. I had a trivial little problem at the flat, which was probably just me being stupid anyway, and they replied within minutes and were out at the flat to fix it the same day. Top service.
They also leave a box of groceries in the flat on arrival which is a nice touch.
Robert was at the property one day and saw me inside. He came to have a chat about how things were going. Also a nice touch.