We had a great stay at Guntis's apartment in Riga. It is nice and central to the old town, which made it easy to walk to most of the places we wanted to get to. The apartment is a lovely space and was very clean and well equipped. Guntis was easy to communicate with through the app, and sent through a helpful guide to Riga which helped us find restaurants nearby (though quite a few of the restaurants on that list seem to be closed now). Check-in and access with the codes was easy and meant we did not have to worry about losing a key.
One thing to note is that the apartment is up 3 flights of stairs, the last of which is quite a tight spiral staircase which might be difficult to get up with large bags or for older folk - but it was not problem for us.
Overall I would certainly recommend Guntis's apartment if you're going to Riga.