Hi Gary ... I don't know too much about it, but I bought a couple of bars a while back, too. I tried using it in one of my wringer washers with pretty good results. I softened the water before use and grated about an 1/8 of a bar. You can certainly tell there is something different about it (more fatty acid perhaps?) because it is softer milled than Fels. Fels grates really well; this just kind of "smushes".
As always, you have to rinse, rinse, rinse with soap to get it all out. This soap (as does Fels) rinses really well (at least for me).
I've also tried it for pre-spotting and it worked great.
The citronella-type fragrance is a little different for me but I liked it after it was rinsed. Fels' fragrance is rather strong to me but softens when you rinse.
You can sure feel the softness in your clothes after washing with soap.
Try it ... you might like it!!