Practically stayed there for an entire summer, loved it. it has a nice garden courtyard, having breakfast in the garden during summer days was a great feeling, and nice way to have a good start for the working day.
There are several large suite rooms with separate living / dining area, would be great for family. Though there is no air conditioning, so if it gets very hot could be tough, however bavarian summer usually does not get very hot, just fairly humid. Renaissance and Marriott are tucked among residential areas, so it also provides a good way to observe ordinary munich life, e.g. on weekdays, there was sort of a farmer's market right along the hotel. The subway is right outside the hotel, so very convenient to go anywhere.