Anything that claims to do all of the heavy lifting for you may initially seem like it is going to be the better option, but there are some drawbacks to the self retracting designs that you might want to consider first. Most of these options are spring loaded, and some have a water pressure operated system inside that uses water to wind your line. The downside to the water powered options is that they can be terribly wasteful, and on average waste between 4-7 gallons of water just to wind it back up. The downside to the spring loaded options is that they aren’t always reliable. Sometimes you line might wind up at just the wrong angle to cause it to get caught or tangled. If that happens, it means that you will have to take the casing off of your unit to sort out the tangled mess waiting for you inside. Opting for a design that you have to crank yourself may mean that you will have to do some manual labor, but it will also mean that you won’t have to worry about your line getting caught, or wasting any precious water.