This review is for the 4 gallon model. These mini-tanks are really made for situations where you have a remote water heater, and you have to wait for hot water. They are not well suited for general use. That being said....I have a broken hot water pipe in the foundation, and wanted a temporary solution for the kitchen sink. Our water temp is around 65 degrees. I gave this a shot.With this set to the max setting, we can do some dishes, but if the sink is full - after a large family meal - the hot water runs out. Even when running at a trickle, or shutting off between washing / rinsing, it can still run out. It's far better than nothing, and it works for me as a temporary solution. We adjust the way we do dishes, by doing small batches at a time.Remember you have about 4 gallons of hot water, and as soon as you start using it, the hot immediately begins to mix with cold water. By the time you have used ~ 2 gallons, you have effectively run out of "hot" water. The small heating element is made for longer recovery times - like 15 to 20 minutes.If you do intend to use this as a "point of use" water heater, it would work in a bathroom sink for washing hands; or a 1 or 2 person household that does not have tons of dishes. It would be great for a garage / outdoor sink - washing hands before you enter the house, etc. Or a laundry tub where you would do small quick rinsing, etc.This will never work for a shower, or dishwasher, washing machine, or anything that uses a significant volume of hot water. Unlike a larger water heater, the output temperature drops quickly as soon as you start using it.The cord does have a standard plug on the end; it is about 3 feet long. It works in a standard 120v outlet, you don't need anything special. Remember if you plan to install in the kitchen, most outlets under the sink are switched (for the garbage disposal), so keep that in mind.If you connect this to your faucet with typical rubber supply lines (sink or toilet type), you do not need dielectric nipples as the instructions recommend. The output pipes are iron, so if you do connect direct brass fittings, you need a dielectric.It comes with the necessary PRV, check local code for use. Many people vent this straight into the drain line, which is not up to code and a good way to contaminate the PRV and blow up your drain if/when the heater vents.And yes, this is the exact same heater as Rheem, just a different label and case color.My one complaint is that the inlet / outlet fittings were super dirty with thread cutting oil and remnants of thread. It took some careful cleaning to get that stuff out. The PRV fitting was also contaminated. That some pretty poor quality control, one star off for that because I was able to clean it without much hassle.