Akabane is a bit remote, but the hotel is right next to the JR station, and it takes about 20 minutes to get to Shinjuku. Remember to go in and out from the side door, which is closer than the main door.
I have stayed at Daiwa Roynet many times before and after, and the hygiene of this hotel is really average. It can't be said to be dirty, but many small details are not clean. For example, the dust on the humidifier and the scale on the kettle, you can see that it is not fully cleaned. I probably won't stay there again.
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