I was at this hotel for 4 nights during my visit to Vienna with 2 friends.
The entrance to the pension is not very obvious and a bit shabby, in a shared building with other offices/businesses. Look for the numbers on the door to ring.
Despite calling the pension ahead of time to arrange for a late check-in and arriving at the specific hour we agreed for check-in, we had to wait outside for 25 minutes with frantic door bell buzzing and telephone calls until finally someone came downstairs to let us in. Other than this set-back in service, the rest of the service was very good and they did allow us a free late check-out to make up for our troubles.
The room was good, not too clean, but okay. Everything in the room worked, though the drain for the bathroom sink was a bit clogged. A quick word with the reception got it fixed right away.
Room had a small TV and a refrigerator, no cable channels. Very few available power outlets in the room. Whichever ones are available you have to fish out with the extension chords hidden behind the bed. Bed were comfortable. Room looks well-kept, but not as well maintained, judging by the miss-matched colors on the walls, maintenance is on a budget.
The location is really what saves this property. A short walk to the ring street where all major attractions are. For the location and price, you can't get much better than this.