Nice hotel, friendly and very helpful people at the front desk. Room was nicely done and quite large. Gym and sauna area were quite basic but all equipment was functional. Hotel is a bit of a walk away from downtown and restaurants/shopping.
Breakfast was very good, but I thought expensive - 20€ per person. As said there are no other choices close by, so at least it's convenient.
All in all, the hotel was a good choice for me as it was close to the office. I would stay there again on the next trip to Oberursel.