This cruise is about 20 minutes along the Dotombori river. We got it free due to our Amazing Pass. Those without the Pass must pay 900 yen or so. If it is free, it is worth it. If you must pay 900 yen, think again.
Not that it is bad. It is interesting and relaxing but you can get the same sightseeing from walking even though of course it will be a bit different.
The value is in looking at those stores, restaurants, clubs etc from a distance. Good for camera