Worth staying with the affordable...

Liked: The location is very good. It's very close to the city center. I could even leave my baggage in my room after my city tour and then heading to a concert without any belongings :)
Disliked: Toilet utilizes drainage pump which makes some noises while flushing and that might surprise you at the first use.

Superb

Liked: Exactly as advertised, excellent public transport by bus, tram & métro, very helpful staff. My future base in Wien.

Exceptional

Good

Pleasant

Liked: The attractions are near enough to the room.

good for what I needed/expected

Liked: Room was fine and had everything working nicely, no real complaints
Disliked: Street noise with tram was a little loud at times, but fine with earplugs. Toilet flushing was quite loud but I never heard noise from toilets in other rooms so it was also fine.

Good

not very happy

Liked: Location.
Disliked: At 1 am every night the internet would turn off and I didn't like this at all because I could be working online at that moment. Also, the bed wasn't comfortable at all.

Exceptional