I've used brass quick-connectors for many years. I like that I can quickly swap out hose-end devices, and also quickly connect the primary hose to secondary hoses that run to remote spots in the yard. Saves on a lot of hose-dragging and container-tipping.
I use Dramm brass shutoff valves on the end of my hoses so that I can disconnect the quick-connectors without making a trip back to the faucet. (Note: Don't get the *slightly* cheaper Dramm aluminum ball shutoff - it will galvanize itself to any dissimilar metal to which it's attached.)
Before investing in a set of quick-release fittings, pay attention to the history and reputation of the company that makes them, because different brands are not always cross-compatible.
Replacement washers are available from the manufacturer, and from some hardware & garden stores, websites, Amazon, etc., and will eliminate the eventual leaks. A regular hose fitting washer won't work, the proper washers have a sealing lip incorporated into their design. The fitting will eventually wear out though; the three steel ball-bearings in the female fitting will wear their sockets into an oval shape, and fail to hold the male end tightly. Before that happens, the male end will develop little dents in the locking surfaces from the repeated engagement of the steel balls in the female part. At this point a new male end usually extends the lifespan of the pair.
