We had a lovely stay at Miguel's place.
The house is very nice: comfortable, warm, welcoming. It provides all you need (the essentials are provided as well, although the AD says they’re not). Also, it’s quite central: Praça Luís de Camões is at less than 10min walk.
On the downsides, it is pretty small, but that’s ok, as long as you are max 2, IMHO. Also, it’s at the fourth floor and the stairs of the house are pretty steep: so, as said in previous reviews, may not be ideal for people with many/heavy bags.

We didn’t meet Miguel when we checked in, but met him by chance while we were going out one day. However, he’s always been available on whatsup to answer any questions. Also, our flight landed at 9am, and Miguel was nice to let us in before the official check-in time.

The only bad thing is that we had a problem with ants, which invaded the kitchen on the second day of our stay. Miguel provided us a spray on the third day, but by the time we came back home and found the spray, the ants were gone and our trip in Lisboa was over.
This was an unfortunate situation which will not stop us from coming back to Miguel’s next time we’ll be in Lisboa.