Staff were professional and polite. Hotel is dated, I'm not sure how it has 4 stars, maybe they were achieved in the '80s, it certainly isn't a 4* hotel now. Hotel is in an area with very few restaurants nearby, or any other facilities other than the MartiniPlaza event space. A walk into town would be 40 mins, so if you are planning on going into Groningen, I'd recommend a Taxi