My family and I had a lovely stay at Miyako, as a culmination of our week long holiday in Kyushu.
Location wise, the hotel is unbeatable - it is not only next to Hakata Station but directly connected by the underground pedestrian network to the subway. The hotel is new, which means clean facilities. I enjoyed the urban sento which is located on the top floor of the hotel - and there is even an outdoor pool.
If there was something that I would quibble with, it's that breakfast isn't included and it's fairly pricey if you choose to eat at the restaurant. However there are some good breakfast location choices nearby.