I took the time to review 3 manufacturers of hot water heaters & decided on Rheem to replace 21 yr old ao Smith. Since, 5-24-18, I have dealt w/FOUR tanks & maybe yet 1 more tomorrow. First delivery, was damaged by a fork lift @Home Depot, which I refused. 2nd tank delivered that afternoon for installation the next day. After installation, the unit was leaking on top. Plumber left & I called the repair no. for Rheem. 3rd unit came out w/another plumber the next day, as the first installed unit was replaced. That installation leaked from the control panel, where a sliver of metal was discovered. Called Rheem & explained that I was not pleased w/the knowledge that just maybe there would be another issue w/the quality of the unit. 4th unit came yet w/another plumber last Fri. Hot water till the following mid-day! Then, the control unit went BLANK! Turned off electricity to tank for fear of a fire. Two days later w/MANY calls to Rheem they agreed to have the 2nd plumber come back to check the unit. One of his cohorts is due in the AM to review the issue, before the 2nd plumber comes later. Confused? Why, should you be? Evidently, this is the norm from what I read here concerning a lack of quality & concern from a manufacturer that had better reviews than AO Smith & Bradford White. Doesn't bode well for consumers being left out in the cold! Have to get moving, & take yet one more COLD shower!