The entire experience AFTER the air travel portion was great. Our cruise manager was just that. Nicola was not the typical "entertainer" that you get on an ocean cruise. He truly manages the whole experience and shows up during many of the excursions to verify all is going well.
The food was great and the staff was wonderful.
Ours was a wine cruise and thus was busy all the time between the normal excursions and the tastings added in.
The cabins on the third deck are subject to noise from the sun deck/walking-jogging path. Even though the cruise paper work said it should not be used between 10 pm and 8 am.
You will meet a few new friends as with only 170 passengers maximum you will have the chance to meet almost all your fellow travelers.
Before booking any river cruise check the age of the ship. AMA Stella was new in 2016. We saw lots of other ships from other lines that were much older and a few that just looked warn out.
RE: "After the air travel" comment above. We were booked on British Air for most of the trip. Their "business" section is NOT the same as business on Delta, KLM or American. Much smaller seats, same higher cost. Get your travel agent to show you the seats BEFORE you pay extra for this when you will be on British Air. It was not worth the cost to me.