Re: No-Knot Fas-Snap, have you ever used it?
You still tie a knot to attach that to your tippet. I tried something similar many years ago. I think Cortland sold what I tried, but same idea. They were OK, but as Silver Creek has pointed out, if you fish with a wide range of fly sizes, it's not the ideal connection for all. My main issue when I tried them was losing both the snaps & my flies to snags. At least with just the fly, the loss was not as costly.
Remember, no one likes to be behind the big truck, but that's better than being under it!