We had a great stay at Martin’s place!
The flat is spacious yet cosy. The kitchen was well equipped, the flat was nice and warm (we stayed there during winter when it was -10*C outside) and the internet connection was good (no issues with using it for work).
The location is great - lots of restaurants and cafes nearby, and you can easily walk to old Riga etc. We could hear some noises (snow shoveling and conversations) from the courtyard, but otherwise we had a peaceful stay.