The apartment is really nice inside; very clean and lots of space and light. It is also close to Spittelau station so you are near to main transport lines for the city centre. If you are planning to rent for a long stay, two things:
The actual workspace for cooking in the kitchen is very limited; maybe this won’t be a problem for you at all but the space is not really designed for cooking every day.
While the location has very good transport links, it is at least 20 minutes (on public transport) to any tourist amenities / the city centre. While the neighbourhood is “nice”, (it’s clean and safe), the amenities there are limited (absolutely nothing to do on a Sunday) and food / groceries / essentials are noticeably more expensive in this district than some other neighbourhoods in the same supermarket chain (Billa or Spar).
Also a lot of public transponder is currently not running after a certain time, so if you’re out past 11 expect to pay for taxis because it’s too far to walk.