Regina's place is amazing, especially for the price.
The building is new and very clean. Located in the heart of the downtown, right next to Radisson Blu hotel, and a short 10 minute walk from the old town. Check out Zen hookah lounge and Goblet cocktail bar - both are really good places a couple of blocks away.
The place itself is well-furnished and super-clean, with a HUGE bedroom and a more reasonably sized living room, but still bigger than what you get in a hotel-style suite. It has everything you might need, except perhaps a dishwasher. The bathroom has a washing machine, but make sure to bring your own detergent, as well as coffee/tea supplies.
Overall I had a very pleasant stay, and a smooth check-in and check-out experience. I'll stay here again, should I need to come to Riga.