Like most "do it yourself" products, Kreem is the victim of the fools who applied it, and to say it's "crap" and it "sucks" is unfair in the extreme.
I wholeheartedly agree. It's particularly interesting when people who have never used the product, disparage the product, as well. This speaks volumes more about them than the product they abhor, IMHO.
The Kreem process is a painting process. Albeit a painting process that is subject to a much harsher environment than most paints. I suspect that people who can't perform a successful Kreem, can't produce a successfull paint job either.
My experience with Kreem extends to one tank. Followed the directions. And, it worked as advertised. I will use it again. I did the last one in 1998 or 99, it was still intact and working fine when I sold the bike last year.
My only complaint is that the kit didn't have enough of the rust eater to fill the tank. This required multiple repositioning events to get all the interior surface cleaned, and extended the time to complete the prep longer than it should have. It would be better to fill the tank to process the entire interior at one time.
Cheers,