The communication was very good with the management company and we appreciated the emails and suggestions about Portugal. We booked transfer from the airport and a Sintra tour and we appreciated their ability to change with only a couple days notice the size of our party (some of our family were unable to come because of medical issues). Both services were good--we struggled to find each other at the airport and they were very persistent about the communication and trying to locate us until it happened.
The apartment was great and as advertised. The only thing we didn't realize was that it was in a residential area so to get to restaurants it required a couple blocks walk.
We booked using central hill apartments when we return at the end of the year because we had a good experience.