I have used it to make some murrini to put in a fused piece, but I haven't used it other than that,
Me too. I tend not to use it that much as I can't mix it with the other glass. I bought the stuff I have for a particular fusing project and it is much more expensive then 104.
But it is good when you are fusing and you want to make your own stringer and bits and pieces in your fused work. And there are far more reasonably priced bullseye colours then those compatible for float. I will be branching into float this year. You can use small amounts of bullseye frit with your 104.