We stayed in the apartment for 4 nights in July
Pros: Location - ideal for access to main sights
Easy communication and check in/out.
The apartment stayed cool, wifi was reasonable and the shower was fine (though no where to put things).
Cons: Bed linen etc. was dirty, there were blood stains etc. and no spares so was a bit unpleasant to be honest.
Incredibly noisy, had no idea Riga was such a noisy city all night long. Curtains too thin in one room which let too much light in
I think this flat is mainly suited to large groups of young friends coming to Riga to party - then it would be good value.