I have now stayed at this old style hotel three times, and for those who want a low price (45 euros) and authenticity, this is the place. The rooms have the feel of the 19th century, and are totally comfortable. I try to stay in room #8, but # 6 is also good. Not all the rooms have shower and toilet (these do - and they are fine), so it helps to call ahead - the place is very popular with French and German families.
It is only a 5 minute walk from the gare, down a small street one over from the main rue Kuss, so it is quiet. From here you can easily walk to all the sites in Strasbourg (10 minutes to La Petite France, 15 minutes to the Cathedral).
Keep in mind this is a genuine, old hotel, with creaking staircases and antique, original furnishings. For a low-price new hotel, the Etap right up the street is excellent. It is radically different, but I stay there when the Bruxelles is full (see reviews).
