We had a great stay at Mar's house. The house itself was tidy, is in a quiet location not far from Sencelles (where there are some nice restaurants), and has great views over the mountains from the pool area.
Mar was quick to communicate, and very helpful in finding the house and answering questions we had throughout the week.
The only downside is that the house can get quite hot during the summer (we were there in the middle of July), due to the large windows. But this is probably a price worth paying for the great views of the mountains.