We stood one night in this hotel. The suite was big: two bed rooms, kitchen, I think that the property is about 60 sq.m or more. Close to Prater (but little bit more than 200m - 10 minutes by walk. Good connection to city center - by tram or bus. Good breakfast. Good service. Good price (It cost me 84 Euro/night in July).
Cons: the property was repaired more than 15 years ago (by style of tiles in the bathroom and by condition of the kitchen)

We booked at Double Junior Suite at 88 Euros for one night. The actual room was in the attic (so my husband couldn't stand in much of it) and was 2 single mattresses on a double wooden base with a tiny fridge - no kitchenette with cooking facilities as specifically booked. Also with no air conditioning this room was stifling hot and the dormer windows only opened a fraction. Worst thing was that there was no shower - just a shower attachment on the bath taps. I cannot believe we paid 88 Euros for a room with no shower in 2011. I naively thought it would be a good location because it was between the Danube canal and the Danube itself but actually it was just a long way from anywhere nice and was out in the superbs. Took 30 minutes to walk to the centre. Breakfast was very poor - only fruit was apples.

I have got a very positive from the hotel.
The best are the room - very large and with a fully equipped kitchen: fridge, stove, dishes, pots, tea cooker, dishwasher machine - everything is there!

Reception is open 24h per day, and the staff is friendly.
The breakfast is 3* average and quite ok.

Located in a good (and civilized) 2nd district of Vienna, close to e.g. embassies of many countries. All public transport connections (bus, UBahn - U3, tram) are not far away, in walking distance.
When sleeping, it is recommended to close the windows to avoid possible noise from the road.

Pretty good business hotel with terrible breakfast, but very custom friendly staff on reception desk. The location is excellent, but if you look better you will find better hotels for the same price. The only problem is that you have to look for your personal things very close - it seams that room cleaning lady took from my suitcase in the room 450 EUR while I was on the breakfast??!!