There is good reason why you don't see many of them because when you disconnect your hose reel all the pressurized water jets out of your system at a million miles an hour.
Not if its installed right.
I have them on my system, and it has a shut-off valve on the inside, you simply close this before you disconnect the hose and there's no problem. This also stops the connector from dripping when not connected (which all female ones do).
I don't like the ones that have female 'auto-stop' connectors, because when disconnected from the hose, the connector has all the power of the pump pushing the little plunger out. You then need super-human strength to attach the hose again with a male piece. And it's at an awkward angle to push hard againast it, especially on a cold day.