There is an optimal experience that the ads portray...eating, drinking, and laughing with other passengers, outdoors with blue skies, and beautiful scenery floating-by. Of the six days and 20 hours from bonjour to au revior, about 20% of the cruising was when we were aboard** and it was not during sleeping hours. But about half of that was spent either waiting in front of a lock, or in the lock. The first time, the lock is cool, but it's preventing the optimal experience, especially since it looks like it's midnight and there's a slimy concrete wall an inch from your nose. So an average of 2.7 non-lock cruising hours per day. Although the rivers were low at the time, the top deck was often closed for bridge clearance, so having the optimal experience was limited to the bow, which held about 40 people (out of the 180 on board). Not that you couldn't enjoy the view from your stateroom, but not enjoying the view with other passengers. So if you were on-board, it wasn't raining, you found a spot outside with likable acquaintances, there's something besides the inside of a lock to see, well, you get the idea. I think this happened once for me. I predicted this would be the case, but make sure you have your expectations set appropriately.