The sofa in Roman's flat is so comfy that I nearly didn't want to get up again after I had sat down.
As other people have commented, the bathroom isn't its own separate room, more like a nook in the kitchen but it's still rather private and the shower's hot, so I don't think that's an issue at all. (The toilet's separate, btw.)
The flat's location is also pretty well connected, as several trams stop nearby and Charles Square isn't very far off either, with more tram and a metro connection.