I spent a weekend with a friend at Kaspar's flat, which is simple, but great. It's amazingly located, we walked everywhere day and night and didn't need to take any kind of transport - but there are several buses and trolley buses if you don't like walking that much. The photos and description are very accurate, and yes, you will have to climb upstairs, it's on the top floor. Very safe as well - the flat complex has an external gate that is closed at night and an intermediate code-protected door. Being at the top floor is kinda nice, we watched the snow fall down on our first morning while having a cup of tea, it was a nice atmosphere. There are also local some books in the shelves, which are very interesting if you're keen to know more about the city, I'd recommend it and stay here again if I go to Riga. The flat was clean, tidy, it's a good choice for city explorers - friends and couples.