First off the location, it's a short 7 minute walk from Köln Hauptbahnhof, there are supermarkets, bars, restaurants within a 10 minute walk north, you're very close to the dom and therefore the centre. Keep in mind that if you have your windows open it can be quite noisy because of trains but personally i actually like that.
Checking in was easy and quick, only had to fill out a little form. The room itself was clean as was the bed, another great part are the typical German windows you can open completely giving it a nice open feel. The only thing about the room (which for me wasn't a huge deal) were that in the bathroom ome light was broken and the small towel had a small yellow stain.
The breakfast is nothing special, you can choose between a couple of brötchen and slices of toast, a tiny salad bar, butter, cereal, hardboiled eggs, 4 kinds of juice and some hot drinks.