Rita's place was really lovely! Super cosy, comfortable, nicely designed and well laid out. We really liked the place and enjoyed our stay.
Lots of space for a couple, great kitchen with all the things you could need, really comfy sofa, good bathroom. Lots of nice touches like extra blankets. Bed was lovely and comfortable. The ceiling in the loft is low as advised - about 5' - we found this nice and cosy, but it may be less good for really tall people!
Location - pretty good, not far to the historic centre, or up to Sao Pedro. The hill is steep though! And the road is busy during the day (which is not so nice to walk along, and a little noisy in the apartment) - it was quiet at night though.
If self-catering, you'll want to go to one of the proper supermarkets in Portela de Sintra - the minimarkets in the historic centre/near the station are very small and expensive. It's not that much further to walk if you take a direct route.
Rita was a great host, really welcoming and helpful, good and quick communication, and good at sorting out problems - there was a burst water main and she'd left bottled water outside our door for us before we'd even woken up and realised!
My girlfriend and I would definitely stay there again if visiting Sintra.