We really enjoyed staying at Arturs place. The description 'cozy little centrally located' is more than adequate. It was perfect for us as a couple but would be great for travelling friends as well. Everything was clean and spotless. The bed was comfy and since the apartement building is on the backstreet of the road it was really quiet.
A supermarket and a coffee shop are right next to house. All the major sights are in walking distance and if you don't feel like walking public transport is just a second away.
Artur was super nice and helpful giving us first hand advice on what to do and where to go around Riga.