Honestly an excellent stay overall though with some standout issues.
Great bathroom, very very comfortable bed and pillows (probably the most comfortable sleeps I've had in Japan). A good amount of space for the price point. It has a nice 15 minute walk to the main Hiroshima station, but it's also right outside a tram line as well. Close to a Lawson, good Wi-Fi. The door is just a number lock with no key, I personally found this convenient as I would split up from my partner frequently.
The negatives:
It's on the first floor and right out to the street. They should really invest in some black out curtains or something for the light from cars and the street, as they are bright and frequent.
Also the walls are paper thin. The room is near the entrance and you can hear everyone enter the building (usually loudly). You can hear people stomping upstairs, opening up their doors, and can easily hear conversations outside.
Basically, if you're a light sleeper I wouldn't recommend this place. They do provide earplugs though, but I personally don't sleep comfortably in them so it didn't help.
So while it isn't exactly peaceful, it was still really good. Less a major complaint but more a word of warning, because it could be a total non-issue for some people.