First of all, I want to thank to the owners.
I recommend this hotel. It is very close to train station and also a street full of restaurants, supermarkets etc.
Staff is polite, they try to help you in case of need.
You should compare the hotel with its class competitors, not with 5star hotels. If you are interested in quiet, only a room , comfy bed and hot shower then go there, the price is reasonable for Vienna. If I will go to Vienna again, I will definitely stay there.
PS : Before going, I was a bit worried about comments with noise, but guess what, it was the best quiet hotel I have been for awhile. I had the room number 33, it sees directly the garden, if you had a chance , ask for it :)