I've tried various brands of braids and fused lines over the last couple of decades. I started off with original Fireline and drifted away from that (due to all the "hype" with the newer "super lines") to Spiderwire, PowerPro and a few others.
Now I'm back to Fireline, but in the Crystal version. I like it, because unlike the true braids like PowerPro, Fireline sails smoothly through rod guides without a lot of noise and/or perceived grinding that I've experienced when bringing in a fish with PP and other braids. It accomplishes this because it is a fused line and not a braid. So I like that. Silence is golden!
I've used it from 2# test up to 14# test, depending on what I'm trying to achieve; species & presentation. And I always use it with a comparable fluorocarbon leader, maybe 4' - 6' long, connected with an Alberto knot. This joint makes a slim knot (not actually a knot, but rather a braid of both lines, sort of like the old Chinese fingercuffs you use to get in the CrackerJack boxes many years ago!).
This line and leader combination has performed flawlessly for me over many season and with 4 crappie rigs. It just works for me.
"A voyage in search of knowledge need never abandon the spirit of adventure."