I stayed at this hotel during Oktoberfest and I doubt I would stay again. On arriving in my room it was shabby but seemed passable; even though I had paid a fair bit for it I wasn't expecting a lot as I know prices are greatly inflated during Oktoberfest. Then I started to notice things like mysterious brown splashes on the wall that hadn't been cleaned off, stains on the carpet, and dirty spots inside the drawers. Even the soap on the washbasin in my room had some suspicious dirty marks on its wrapper. I went into the shared bathroom and found that in a pretty bad state...The toilet was in a serious mess and there was a strong smell of urine on one side of the room. I had checked in relatively early in the afternoon so I decided to give them the benefit of the doubt and assume that the cleaners hadn't been through yet, and when I came back later things were in fact a fair bit better in the bathroom (though still not as clean as they should have been). The other shared bathroom was less shabby than the first and a little cleaner, but the bathroom sink was later decorated with a large hairball which was attached to the plug from the sink and appeared to have been accumulating there for some time.
That night I was unlucky enough to be in a room next to a couple who were screaming and swearing extremely loudly. I could hear every word, including threats of violence. I was scared on behalf of whoever was the weaker of the pair (and considered calling the police), but also quite literally too scared to leave my room to use the bathroom until there had been silence for quite some time. When I did finally leave I came across a man (one half of the couple) with blood/bruising on his face.
In the morning I explained the situation as best I could to the clerk on the desk (there was a language barrier as I don't speak German). He seemed quite concerned about it and was happy to let me change to another room. I don't know what happened to the couple as I didn't see or hear them again after that.
The next room was much nicer and cleaner...BUT even though I stayed on for another two nights the room wasn't cleaned again; they didn't even empty the bin. I also found a balled up towel behind the curtain which could have been there for a while.
It really did seem like cleaning was an afterthought rather than a priority here.
So to summarise -
cons: lack of cleanliness, shabby rooms, a feeling that they're not really serious about running a business
pros: friendly staff, good location, possibly a candidate for one of those "hotel rescue" reality shows