I stayed here for 5 nights while at a conference. The hotel is not located in the very city centre, but is only a short walk away. It's around a 15 minute walk from the station, it's all flat but you'd probably want to get a bus if you have lots of luggage.
My room was fine and clean, typical of an Ibis - fit for purpose and functional. I put the sign out for it not to be cleaned a couple of times as it simply didn't need it every day. There was no bath, just a shower, which is what you expect from Ibis.
The breakfast was ok, got a little boring by the 5th time. Typical German breakfast items along with a small number of hot items. I did find the lack of pastries noticeable, there were only croissants but I would have expected more (at least pain au chocolate!).
Overall a good stay, I would recommend if you're looking for something not too expensive and you're fine with not being right in the city centre.