I found Travel2Riga on tripadvisor while searching for activities and made contact. There were a few delays / no responses to start with and this did take the edge off my first impressions (especially reading other reviews on how efficient they were).
However, when we arrived everything went like clockwork. The transport from the airport was great fun, followed by beer tasting. We organised a quad biking activity and this was awesome - great guide and a lovely setting.
Would use again.