Hotel Praterstern

I was in this hotel for just one night, for a short visit to Vienna. It's on a small street, just 5 minutes walking from the train station and about 10 minutes from the city center.
The room was good, pretty small, but very new and cozy with bright decor. The bathroom was also a good size and completely new.
The strange thing about this hotel is the price. At first, I reserved an individual room at 29 euros, but in the end it had to be a double and the price shot up to 75 euros, more than double! I don't think these prices are warranted, even though breakfast is included.
In short,