We have stayed in Isabel's house for one weekend and the only complain we have to make is that time wasn't enough :)
Her house is awesome, perfect for a group of 10 people or smaller. You'll find in there everything you need to spend one weekend at the ocean. The beaches are close, no more than 10-15 minute walking distance and the ocean view is amazing!
The house was very clean, well sanitized and Isabel provided us masks and disinfectant for when we went out.
I don't have enough words to say how much we loved that weekend and for sure we'll stay in the same place on our next visit to Ericeira.