My second stay at this Renaissance Hotel was once again quite enjoyable. The room I booked was very well equipped - including a fully outfitted kitchenette, work desk and small seating area. The bed was comfortable and the room was kept very clean. The bathroom is quite small and dark, but very modern and for a single traveller it is sufficient. If you do need parking, the hotel garage is of normal size (no mini driveways!), and a safe place to park your car).
On the negative side there were some service mishaps: i.e. the only available lift breaking down on one morning, and house keeping leaving both windows open all day after cleaning, so that I came back in the evening to an ice cold room. However, service recovery was quite swift - with the lift being repaired within a few hours, and management extending their apologies for the "ice box room experience" very quickly and genuinely. The front desk staff does care about customers here, and is very, very friendly and welcoming.
Finally, the breakfast service needs to be highlighted: food and beverages on offer are first class, and the breakfast service is a truly delightful experience to start your day with.
Overall, I can definitely recommend this hotel which is conveniently located if you like the Ottensen and Altona neighborhoods. It's on a quiet street, but with a supermarket, restaurants and public transportation all in short walking distance. Good choice for Hamburg, and real value for money.