There are not many places to stay in Korbach. I've tried this hotel last time. After entering the hotel I was not impressed much, since the hotel is not a new one, but maintained (only lift looks really a bit older). Nevertheless I have to say the room was perfect. In my opinion, must have been renovated. Wi-Fi connection is free (I had to point out, since still not standard)
Definitely, if you look for a hotel in Korbach, Touric might be good choice.