I had a great stay at Casas Burnay, the flat was really clean and comfy. The location is as many times described perfect. Rita provided a lot of informations about things to do in Ericeira and made sure that I had everything I needed. The internet connection was really fast and reliable, I did not encounter any problems while working remotely.
One thing need to be mentioned though, the walls are really thin and you can hear a lot from your neighbors (moving chairs, conversations, tv etc.). We were quite lucky with our neighbors most of the time and if you get unlucky just have a chat with them to make them aware of the noise level. The house itself is of course old and there is nothing the host can do about it, but just keep that in mind if you are a light sleeper.
Nevertheless, I had overall a great stay at Casas Burnay!