Werner's place is neat, clean, and well-appointed, with plenty of furniture to make for a comfortable stay. The bathroom is very nice, with an extra-large tub for those who like baths. If you are really intent on cooking, then the kitchen can be a bit cramped. But if you are bringing food in or making simple dishes, it is well-stocked with dishes and utensils. Those with a car will appreciate the easy parking, though the place is very close to good public transport lines.
Werner himself was very helpful and provides some very useful information for visitors who are new to Berlin. He speaks a number of languages and was easy to get along with. Overall, a great stay and highly recommended.