I stayed at the Hotel Casa d'Oro Luciani - parco di schonbrunn (the hotel has many different names) for 5 nights, while travelling for work. It is a 15 mins walk away from the Euro Plaza, a perfect location if you need to work there. The area is well connected, with several buses, and a underground station at 10 mins walk away. The city centre can be reached with public transport in half an hour.
The breakfast is quite good and satisfying, with a wide selection of both savoury and sweet food.
The room is ok for a short stay, but very unconventional: the bed, a desk, a washing basin and a shower are all in the same room, with a separated toilet, which I wouldn't recommend for sharing.
The staff was inefficient, to say the least: they didn't check my ID at the time of check-in and check-out and they couldn't speak english. The staff was rarely available at the reception. The double bed was provided with only a small duvet which couldn't cover all of it. On the second day the room was left without any towels and from the third day on many ants could be easily spotted in the room and the breakfast area.
The overall rating for the hotel would be anyway good, if they hadn't taken advantage of language gap and had moved me in another room which they wanted me to share with another guest of the hotel, mentioning an overbooking as a cause (I had booked the room two months in advance). I had to find a german interpreter to ask me to be moved back to my room.