We're a couple from Canada and found Miguel's place really comfortable, super-clean and really conveniently located. The size is perfect, the beds are comfortable and the location is about two streets over from the Metro line at Avenida.
There's a MiniPreco grocery store at the bottom of the (incredibly steep) hill and to the right of his apartment with all you'll need for a short stay and down the street to the left is a really nice local, hand-made pizza joint. It rained the whole time we were there, but there's a really nice private terraced courtyard at the back of the apartment you can lounge on and the vista from the bedroom window is Instagram -worthy!
Miguel was busy and couldn't make it for our check-in time, so he sent a friend who was super-kind and extremely helpful. He showed us how to use all of the things and how everything worked, then went over good places to eat and where important areas were located. He was waiting for us when we got there.
(Travel tips: Go to Portugal Internet's website and rent a mobile wifi hotspot for the length of your stay ($56 Cdn. for unlimited bandwidth) You pick it up at the airport one floor above the Arrivals area and it was a lifesaver for us. While you're at it, bring a portable 5,000 - 10,000Mha USB battery with you too. We cycled through charging phones and the wifi hotspot all day and we hardly ever got lost. Also, download 'CityMapper' from the App Store - it'll save you MAJOR headaches in Lisbon until you figure out the – tricky at first – subway system. And buy the 24-hour travel pass cards from any Metro station - it'll give you unlimited transport on any Metro tube, local bus or tram for 6 Euros across the entire city. You can literally get anywhere in Lisbon with this pass.)
This was a great holiday and we'll never forget it. Miguel's apartment was part of why it went so well. Highly recommended.