I know of the site but have never tried any of their stuff.

I use Bill's deodorizer and used his detergents when I cleaned with my Von Schrader.  I also used his Premium Blend to OP with and had good results.  He's a good guy to do business with and his products work well.

Good as EGC Hk etc?

I tried the Premium Blend when I was doing dry foam extraction with a Chemstractor, It's a very good product with a good brittle drying polymer. Bill use to send along with his cleaner a small bag of the dried down polymer.
Premium Blend mixes 4 oz per gal and cost less than $20 a gal., makes me wonder why all the encap products today cost so much more.