I also use Maxima UG to make steelhead leaders, but I generally buy tapered leaders for trout fishing. The UG is a great tippet material, although they're fairly thick and is way over-rated (tensile strength wise).

I have also used Seaguar fluorocarbon leaders with good results and prefer them over UG as the trout tippet material.

Have not tried the Vanish, but I have heard some negative stories and have seen many stores clear them out. Weak knot strength, tensile strength, etc.