I like the WEN products. I have always recieved exactly what I ordered and never been charged extra.
My hair improved almost immediately. I have been using it for almost a year now. My only concern is that I have very long and very thick hair...the standard shipment isn't really enough to get me through 3 months, but that is not their problem!
I think the comments from people who think their hair is greasy are just not used to their hair being smooth, almost slick. It doesn't have a residue at all, it's just very smooth.