This is something I wasn't intending to buy. I purchased the insulated tube kit from Backcountry, and it turned out that kit required the quick link kit. Luckily it's fairly inexpensive. I was a bit nervous about the quality when placing my order, but after assembling it.. I feel confident in the future with it. No instructions come with it, but it's pretty straight forward. I've included a photo to illustrate what you will need to do. Grab some reliable scissors and make a nice straight cut on your old tubing. I chose to go about 3 inches up in the event I screw up the cut, or if leaking happens in the future. After the cut is made, slide the pieces in place. Just be sure you put the correct pieces as I've shown, otherwise you'll likely have a bad time if you get a new tube, or anything that uses the Quick Link feature. Once you've shoved the pieces in place (with little effort required), you're good to go! It's on there nice and steady and some quick hard tugs didn't even cause the tubing to nudge.
If I run into issues down the road, I'll report back. But so far I'm pleased and impressed with it!