I just returned from the A-Rosa Stella Provence river cruise (sailing on Saone and Rhone rivers), August 2013. The all-inclusive cruise experience was great!
The cruise included a wide range of ages from 30-80 yrs -- several 30-40 year olds who loved to party from USA, many 50 year olds from USA, and about 40 German / British passengers.
Our French balcony cabin had 2 doors that opened wide (not just a sliding glass door) , which added to the enjoyment of views along the river. On several mornings, we were welcomed by gorgeous sunrises and swans as we arrived into the port towns. Cabins offered lots of storage, both hanging racks and shelving.