I washed several loads over the weekend, and they came out fine. I couldn't tell any difference than with regular detergent. If whites start going gray over the long haul, I have no problem with bleach.

Last night I got a good bit of mud splattered on my work khaki's. I took them off right away, put some of the glop full strength on the mud splatters, and went off to make dinner and do a couple of other things. When I went back by the washer a couple of hours later, I could still see the mud, and some of the pre-treat had dried to powder. I threw them in a cold wash, and.....they came out great! Actually better than my usual on mud stains. I think this one's a keeper!