Good things about this hotel: the A/C could get nice and cold! we stayed in 2 hotels while we were in Hamburg, and this one definitely had the better A/C. The hotel is decorated "funky" which you may or may not like, but the bed was comfortable, the shower had nice water pressure and was hot, the place was clean. We added on the daily breakfast and I was pleasantly surprised. Good spread with coffee options, tea options, scrambled eggs, deli meats, cereals, croissants and pastries, breads. There was even a vegan section if you needed that (we didn't). It was nice to just go down and have a hearty meal to start your day of exploring the city. The area of the hotel is a bit industrial, and it's on a busy street.
Our room was not ready early, but the hotel was happy to store our luggage for us until regular check in. They also called a cab for us to go to the airport, and completely understood our need for a "larger" cab due to me traveling with a bicycle in a travel case. I would stay there again.