The SA8 Stuff is incredible, but you have to deal with AmQuix people to get it.
I use one called "Goof" for heavy stains, it is designed to get paint and crayon out. For normal stuff, I use good ol Shout spray, or Spray and Wash Stick. For really bad stains, I use a combination of the 3, that hasn't failed me yet.
The Calypso cleans very, very well and I have found that I really don't need stain treaters. It has even gotten old stains out. On really stained clothes, like my 5 year old boy's jeans (usually grass stains), I use the stain treat option and everything comes out find.