Simple, but with everything you might need during the stay. There were sleeping places for three people, a washing machine and nicely stocked kitchen, though quite small. It would be nice to have a dishwasher, but for just a few day we managed with hand washing. The flat was very big, though it was quite dark due to small amount of windows and a bit cold, but that is understandable due to an old building. The flat was in an area of the city with a lot of shops, restaurants and there were plenty of bus stops in the area.
Overall, a good, affordable option for a few days in Riga.