Excellent choice of accommodation.
Oskars is an amazing host - very thoughtful and approachable. He is happy to help with any inquiries and requests as well as have a friendly chat.
The apartment has everything you might need, starting from kitchen equipment to bathroom amenities like shampoo, washing capsules etc.
Flat has a very good isolation so even with cold weather you don't have to keep the heaters on at all times. The size of the apartment is good also for a long stay (I was staying for bit over a month).
Great location; one of the main streets only couple of minutes away allowing you to travel everywhere in Riga.
I would definitely recommend his place and hope to stay there in the future when visiting Riga again.