There are lots of reviews on cruisecritic.
the ships are the old R ships, Princess and Oceania also have a few.
we have sailed on Oceania and we like the ship size... not sure on the quality of food etc...on Azamara but Oceania is very good
Alexandr Pushkin, Carnival-Holiday, HAL-(old)Westerdam, Orient lines-Marco Polo, Royal Olympic-Olympic, NCL-Dream, Dawn-Princess, ACCL-Grande Caribe, Oceania-Insignia (3), Regatta(4) Marina (1) St Lawrence Cruise Lines-Canadian Empress
Scenic River cruise June 11,2012