Me and my boyfriend stayed in Isabel's place before we both went home for he holidays. (We live in Lisbon)
The place was really everything we needed. It has a comforatble big sofa, a TV with a lot of channels, a SUPER comfortable bed, it's quiet (besides some children playing outsde twice a day in a school next to the apartment, but it's not a big deal), the kitchen was very easy to use and there was lots of space for 2 people.
I had to work one day online, and the wifi was super fast and there was a strong connection everywhere in the apartment.
If I would have to name one thing to be critical, it would be that you can only have a warm shower for some minutes. I guess the water boiler is small, and it takes a while for new water to be heated up. Which resulted in me standing under a cold shower twice. BUT, it's a beautiful shower ;)
Despite the shower, I do recommend this place, since it has everything you need and it really, very comfortable.