I used to use the Surround Green back before Encap green existed.  I liked the smell quite a bit.  Didn't like that it dried to more of a firm shell than an "expand and shatter" type, but from what I gather that is by design and some argue that it is better.   Worked as well as encap green, don't know about resoil rate.  I switched to EG mainly because the EG has deodorizing properties.  The surround free is an interesting concept, suitable for use in the ultra sensitive such as the homes where I currently use Quantum Green.    I haven't tried any of the others.

I got a case from John over there.  He said he will put a few samples of his fiber pads as well for me to try out.

Will it replace the original Ultra? What are the new benefits?

I agree the name Ultra should be just that. I have never been disappointed yet, may have to try the new strength though remind me when I reorder, keep up the great work!