Overall, I was very happy with this hotel. The receptionists were very friendly, my room was spotless, comfortable and a great view from the 10th floor. I only stayed a night, so didn't use the kitchen facilities, but it was very well equipped with everything you'd need for self catering. I travelled with a friend who brought his dog and it was a big bonus for us that pets are allowed at the hotel.
Although the description on Expedia says that the hotel is in an entertainment district, we didn't find much in the way of entertainment. There are some supermarkets, a bakery and some fast food places close by, though - and a really good Chinese restaurant across the street.
The S-bahn station is about a ten minute walk away so getting to central Rostock and the beach at Warnemunde is easy if you don't want to drive.
If you're into DDR architecture, this neighbourhood is for you.