I enjoyed staying at the Via Inn Hiroshima. We were there four tourism, and the hotel was a good home base for my family. It's a little walk to the main sights (Peace Park, Hiroshima Castle), but easily walkable in about 20 minutes, and the walk is very pleasant since most is through a very active pedestrian shopping arcade. Plus, the tram can take you there just two blocks away. There are a lot of great restaurants within a couple blocks.
The staff was so courteous and so responsive! Just great, as was the breakfast! The rooms are definitely quite compact by U.S. standards, so that's the main thing to be aware of. However, they were quiet and comfortable, and we got a good night sleep.