The products appear to work well for people, and they seem to serve as reasonable substitutes for many of the products they emulate. They do not, however, give exactly the same results.
I've been told that the educational markets like them because of low toxicity, including no metol. I've also been told that the paper developers don't give the same deep blacks as some of the metol laden alternatives. As you may have noted, observations like that have a subjective component to them.
If they are being made in North America, that ads an option that is a plus for me, because sourcing almost all chemicals from Germany (Kodak and Ilford) leaves one vulnerable to a whole bunch of factors entirely outside my control.
One minor complaint though - what is it with the thread title?
I use thread titles to help me decide on my APUG reading choices. It really helps if the titles give me a hint about the subject of the thread - something like "Anyone Try LegacyPro EcoPro Chemicals?"
I'll ask the moderators to update the title.