Definitely worth visiting!
Nice, cozy and clean apartment in a quiet place. Especially, if you are not scared of walking. Vienna is quite a big city, so it’s 30-40 minutes walk to the city center, eventually, there are lots of things to see along your route to the main features. Very nice and friendly hosts! Be aware, that there is no microwave.
In general, it is one of the best apartments I’ve been to while traveling :)