Stayed in a double room for three nights. Like the rest of the hotel, rooms are nice and modern, and very clean. Beware though that rooms are also very small, like many Japanese mid-range hotels!

Rooms feature a comfortable bed, television (local channels only), tea making facilities, nice bathroom and wireless capability. Like another reviewer, the wireless network on my floor would never work. Oh well. There are computers on the first floor if needed.

The hotel is very close to Hiroshima station, making it ideal for those arriving by train. You can easily walk into the city centre (for attractions like the atomic bomb museum, peace park, Hondori shopping arcade, etc) or trams are 150yen per journey anywhere in the city. There is also a convenience store close to the hotel; like all Japanese convenience stores, it sells just about everything imaginable, from food to alcohol, cigarettes, stationery, stockings, etc!

Staff are pleasant and unobtrusive. I speak Japanese so I'm not sure if the staff can speak much English. The hotel is closed for a few days at the end of year.

I'd recommend this hotel for anyone. It provides great comfort and value for money; just be aware that the rooms are small by foreign standards.

Stay there for 2 Nights in early Dec, 2007;
Price per room per night was（yen) 12,600, including tax and servicecharge
for a room with 2 double beds and 1 sofa bed. It's a bit too close
for comfort when the sofa bed was unfolded, leaving little room for luggages;
on the other hand, our room situated on the 9th floor facing the river rewarded us with a pleasant view of the Kyobashi-gawa and Enko-gawa Rivers, especially
at late evening.

Pluses:
A clean and tidy budget hotel; non-smoking room was requested at reservation and is available at check-in.

The usual in-room amenities included: temperature control, shower, washlets, TV,
free wi-fi access (see cons below), towels,tooth brushes, tooth paste, fridge,
kettle, tea bags, and radio clock.

Help-yourself amentities in lobby area included: razor, cotton ball, two PCs for
wired internet access and vending machines.

Hotel Flex is located about 500M SW of JR Hiroshima Station, a good
under-10 minutes stroll. By taxi, we paid about 500 yen.
It is convenient provided one doesn't mind some walking.
The nearest tram station is the Kanayana-Cho station on Aioi-Dori Ave,
which is a good 10 minutes walk through 5 short blocks with narrow to
no side walk.

A Seven-Eleven-like convenient store is right around the corner.

Minuses:
The room can be a bit too small for party over three people of average size.

I was not able to connect to their free wifi (from the
SID one can deduce the access point is on the 8th floor below) .

[-]

This is a nice, clean hotel. I thought it was easy to find. The hotel
is clearly marked on the free tourist map you pick up in the tourist information booth at the train station. Hotel is in walking distance to the train station - so it is easy to arrive, drop your stuff off and go on to the peace park, castle, gardens, etc. It is a short walk
to the tram stop. You could also walk to the main sights as well all within a 1/2 hour. And, Hiroshima is a nice city in which to take a stroll.

Yes, the rooms are small -- but about the same size as other budget hotels in Japan. And, the price was great. They had free internet computers and front desk people spoke decent enough English. Hiroshima is a surprisingly pleasant city. Make sure you see more than the peace park -- and go to a Hiroshima Carps baseball game. The
hotel can tell you how to get tickets.

Stayed for 1 night in Hotel Flex. It was relatively easy to find as I had been to Hiroshima before and knew it was on the same side of the station as all the signs pointing to A-Dome. The room was very small... really no room to even flatten my suitcase. I had emphasised that I didn't want a smoking room on my request and luckily that was adhered too. Nice river view from my room. Having internet access in the foyer side room was a bonus, but it was quite hot where we had to sit as it was right in front of the vending machine. Had to walk a few blocks to access streetcar, but it wasn't too far. They kept our luggage on the day of our checkout in the side room where the vending machine was... i didn't think it was a very safe spot. Overall, a pretty good stay.