The Koriyama Dormy Inn is located about 2 blocks from the exit of the main Koriyama train station. As such, it's very convenient. The staff were especially helpful to me, as I arrived too early for check in, but they allowed me to easily store my backpack until it was time to check in. The staff also was AMAZING at assisting me in general information about Koriyama (where to eat, what to do, etc), and very friendly overall.
The room was normal for Japan - spotlessly clean, and well maintained. The hotel also has an expansive onsen contained inside, and that was wonderful to enjoy both in the morning and late at night, especially after a long day.
Koriyama is a working city, but has much to offer. Dormy Inn I would highly recommend staying at, as it's convenient, secure, clean and offers the wonderful onsen.