First off, if you want to try it, DON'T BUY IT FROM THEIR WEBSITE! Buying it from someplace else like Amazon is a smarter idea than what I did. I bought from the wenhaircare website and they sent me another 90-day package, which I didn't order, when I was about to return my 30-day package bottles. I already opened the second box not knowing what it was, so I hope when I send these bottles back they'll at least not charge me for the next two months.
The hair care process is a bit more time-consuming than I hoped for. You wet hair THOROUGHLY (1-2 minutes), lather 16-32+ pumps into hair (3-4 minutes), comb through (1 minute), leave it in for duration of shower (however long that means for you -- keep lathering throughout shower), rinse (1-2 minutes -- it's a lot of product to rinse out), apply leave-in conditioner and styling creme. You have to really focus on what you're doing with the Wen in you hair, so not only does that take more effort than regular shampooing and conditioner, but more time in the shower (which, for water conservers may be a big downside). The product is also thick enough to clog a weak drain, so be careful.
My last downside is that the 30-day or 90-day packages do not last that long. Following Chaz's instructions of using about 40 pumps every time I shower, my regimen lasted no more than 16 days. My advice is to use as LITTLE of it at a time as possible. He recommends the more the merrier; I say, use a moderate amount (at most 12 pumps for REALLY THICK hair in the shower) and cleanse more frequently than before.
Now for the results: it's pretty good. I'm a Polynesian woman living in tropical Hawaii with thick, curly hair. My only damage has come from one at-home relaxer years ago, pregnancy, and genetic hair loss. Curly hair like mine needs a lot of products to get it to listen to you. This one was no exception. For cleansing and making my hair feel soft and healthy, it did its job well; for making it LOOK soft and healthy and bouncy and curly, it needed some help. But I'm having a hard time going back to mousse and gel since using this, so now I have to find other styling solutions. Living in humid weather always adds to the frizz factor, but I thought this would at least ameloriate the situation a bit.