We had a pleasant time at Matt's flat. What I enjoyed the most was the silence in the flat and in neighborhood, couldn't hear a noise, which made it easy to sleep at night.
The flat itself really is how you see it in the pictures. It has all the utilities you need during your stay, including cable internet and Wi-Fi.
There's a Tesco supermarket just around the corner and a nice restaurant just on the street above called 'Lavička' that Matt recommended, it had some nice traditional Czech food.
We walked every day back and forth to the city center which only took about 15 minutes. So we never even used the public transport during our stay there. I would definitely consider Matt's place again if I come back to Prague again, which I'm sure I will.