While not a fancy hotel, the Chelsea is full of character and history if you are interested in art at all. Cologne was a big art center in the 80s and this hotel was at the center of it. So if you’re into that kind of thing, it’s a nice bit of history. Rooms are clean, service is matter of fact, breakfast is decent (the buffet is not the vast spread one might be used to at other German hotels). All in all, a nice and interesting place to stay. The area around it is nice, and in walking distance to most places. Cologne is a small town after all.