We stayed the previous night at LovelyStay's other Sintra property, Casa da Pendôa in the old town and loved it so much that it factored in our decision to stay in Sintra another night. If there's a room available at Pendôa, book there! Unfortunately, no rooms were available at Pendôa the second night, so we decided on Casa da Estefânea knowing that the location away from the old town wasn't as good.
What we didn't expect is that there would be no hot water, damp rooms, and some other basic amenities lacking.
The lack of hot water was especially annoying because we'd hiked 15km that day and both needed a warm shower badly. To LovelyStay's credit they were super responsive to my calls at first, sent someone immediately to look at the shower and verify the hot water was out, and put me in another room in the building that they thought had hot water.
The hot water in the new room didn't last long, and even if it had, I think they can work on some other stuff at the property. Eg, the TV remote batteries were dead. Since there was no way to change the channel without it we had to skip TV as well - no biggie, but it's basic stuff. Also, the rooms really need to be aired out better somehow.
There were some positives. The bed was nice, the wifi was reliable, and as I mentioned the hosts were responsive to the hot water issue. And the price was fantastic, so if you're on a budget it could still be a good option. Hopefully they'll work out the other issues.