The appartment is really great, - light and full of space. The location is very easely reached by tram and U-bahn. The appartment is very close to traffic, but it´s perfectly quiet inside, also with the windows open.
Even though I would recommend the appartment itself, and the host was very welcoming and always with quick communications and responding, we didn´t feel 100% welcome by the neighbours. We did have a few complaints about making noise(kids), but maybe they don´t want kids around? We have spoken with the host about it, and hope she is talking to the neighbours about it, because it´s just sad that this wonderful appartment (and host) and future visitors should have their experience somewhat spoiled by others.
Again, I can really recommend both appartment and host, the location.... and Vienna!