Nice hotel and good value, if out of the way. If coming via Vienna's excellent U6 line, be sure to print out a map from the station to the hotel - it is about a 5-8 minute walk and the locals may not know where to point you. Excellent breakfast buffet. Restaurant is pricey - strongly recommend the wine bar Heuriger 5er Pflug - http://www.pflug.at/ around the corner for a good, local atmosphere meal at a much more reasonable price. Very helpful staff. BTW, the garden creates a nice atmosphere, but it is not nearly as scenic as pictured on the web site.

Gartenhotel smells of smoke. This isvery noticeable when you dome from smoke free countries. Even the non-smoking rooms smell of it.
The rooms are comfortable but dated and need some fresh paint. The beds are comfortable but I have been woken up and some have my colleagues, but strange mechanical noises at night.
The staff are friendly but only moderately attentive. Service at the bar is slow, reception OK.
Breakfast is OK but don't expect a wide range of hot foods.
If you need to stay here for business for a night then it's OK, otherwise look elsewhere.

We stayed here all of four hours on a recent Sunday. And that was only because we searched for a restaurant that was open, and then for another place to stay before checking out. Let me be precise, the room I was given was neither clean, nor located on the garden side as requested. The bathroom smelled as if someone urinated on the floor, and the room itself was stuffy and appeared to have seen much better days. Oh yeah, the place is so conveniently located I needed a GPS to find my way. Four stars? Hardly.

If you you want to visit Vienna and you look for a quiet place to rest this is the best places you can find. Although it is not situated in the centre of the city, the hotel is nearby the subway station and the neighbourhood is quite nice. However, i would not recommend its restaurant, where the prices are pretty hugh...