The apartment was clean, new, and in a very good location, both very close to the bus station and the beautiful old town. The host was very communicative and ensured that the check-in process was as easy as can be. Staying there was pleasant and convenient.
If I had to pick out a few drawbacks, the mattress was a bit hard (of course, that depends on one's personal preference). There was also a party happening somewhere closeby at night, and it was quite audible from within the apartment, so keep in mind that staying at the city centre might not be suitable for those who want to live in a more quiet area.
All in all, I do recommend this apartment, and I would definitely be staying here again when I come back to Riga next time.