Overall, it was a good holiday. Hotel's Rotenburo (outside Onsen) was enjoyable and the hotel located very near to the station and convenient. However, compared to other Onsen towns (I went to Kinugawa Onsen and Hakone Yumoto Onsen), the eating out was much expensive and limited. Also it was not easy to travel for British due to language. They are focusing on Korean than English language.
Jigoku meguri was must to do, and Yufuin was interesting to visit.