Reviews on Rheem hot water heaters can be found online at Amazon, Home Depot and Furnace Compare. Consumer Affairs' website also lists a large number of consumer complaints and reviews for Rheem hot water heaters.
As of February, 2015 the large majority of the reviews of Rheem hot water heaters on Amazon and Home Depot are positive, with many reviewers expressing that Rheem hot water heaters are quiet and energy efficient. Overall, the majority of reviews at Furnace Compare are positive, but most of the reviews left there since December 2012 are negative. Consumer Affairs is mainly intended for people who want to share negative experiences with products, so the reviews of Rheem hot water tanks are almost entirely negative with a lot of specific details included.