I was with a tour group originating in the US - the river cruise was part of a longer tour in the South of France. Apart from our small group of Americans, most of the other guests on the ship were French people of a certain age. The ship itself is fairly unimpressive compared to Viking or some of the larger river cruise lines but, in my view, the smaller size is actually a plus since lends to an air of intimacy. The cabins are small, as you would expect on any ship, but the bathroom is especially so. The mattress on the bed is very thin and began to hurt my back towards the end of the cruise.
Croisi offers an open bar for basic wines and liquors and charges a small fee for top shelf brands. Even though I don't drink much alcohol, I really appreciated not being nickled and dimed for every beverage consumed including soda, juices and water. With the exception of the purser, most of the ship's personnel weren't especially personable and some were downright unfriendly.
Food in general was good with the exception of the breakfast buffet that offered undercooked eggs, a sparse selection of cold cuts and canned fruits (but delicious croissants and bread.) Lunch and dinner consisted of 3 or 4 courses. Options on the main course are not offered. (If you have food allergies or just don't like a particular entree, they will do their best to accommodate you but you must make arrangements yourself with the purser.) The entertainment in the bar--primarily a gentleman who played the keyboard and occasionally, the violin-- was all right if not always to my taste.
In summary, this cruise is a great value and was very enjoyable so, Yes, I would take another CroisiEurope tour.