THE GOOD:
Unbeatable location at the very centre of Naha. Compared to the more luxurious Hotel Collective just across the road, a little bit cheaper.
THE NOT SO GOOD:
Depending on how price sensitive you are, but compared to the Hotel Collective across the street the price is only a bit less, JAL is quite expensive, but a completely bland and standard business hotel, with bland rooms, bland food, and bland amenities etc...
It's just like any other standard business hotel in Japan, so you get exactly that. Bog standard.
So an absolutely solid experience without any failure, but nothing special - in other words, JAL Hotel is the exact hotel equivalent of the JAL airlines brand...