There was constant maintenance occurring during my stay. This isn't necessarily bad. However, it started between 7 and 730 am everyday and was quite noisy. Sleeping in is definitely not an option. Staff are hit and miss, a few friendly and a few apparently disinterested.
I give top marks for the breakfast. Very good.
Also, convenient walk of only 250m or so to the Enkplatz Metro stop. Immediate area has nothing much to offer but some useful supermarkets. It gave the impression of a fairly safe, semi-urban location.