We stayed a week in the apartment. We couldn't have asked for a better one. Very nice, modern and clean. There where clear instructions on how to use all the electrical gadgets which was very handy for none japeneese people like us. Having spent a week travelling before our arrival we truly appreciated the washing machine and the ability to cook our own food, there is a grocery store about 100 metres away. We also enjoyed the Google chrome on TV to stream movies on.
Our host was very quick to respond to any question we had. We got a guide over the area that was very handy.
The only thing I'd say is that tall, big people above 1,90 metre might find the toilet slightly small.
We highly recommend the apartment and would definitely come back.