First he sent me Bio-Sea, then IIRC, he sent me Marine Environment 2-part with the little bottle...for the price, I didn't think it was a good buy, nor was I impressed with the results of either. It could be said that I didn't use either one long enough to give it a fair trial, but I couldn't justify the price for either to actually BUY it...free it was ok, but not for their price.
Lots of people are using Tropic Marin's "new salt mix" with great results, and the Deltec salt is getting some good reviews too. (I haven't used either one, so I can't give my opinion on either)